The document provides an introduction to database systems, including:
- Key components of a database system including the database, DBMS, schemas, instances, and three-schema architecture.
- Data models used to represent data at different levels of abstraction.
- Roles of different users who interact with the database such as administrators, designers, and end users.
- Architectures for DBMS including centralized, client-server, and multi-tier architectures.
- Concepts of data independence which allows changes at one level without affecting other levels.
CS3270 - DATABASE SYSTEM - Lecture (1)Dilawar Khan
This document outlines the key topics to be covered in a database course, including: understanding database concepts and the relational model, learning SQL for data manipulation and definition, database design techniques like entity-relationship modeling and normalization, and hands-on experience with Microsoft SQL Server. The course objectives are to help students understand databases and DBMS systems, apply relational concepts and SQL, and be able to design database applications. The document also provides an introduction to databases by comparing traditional file-based systems with the database approach.
1. The document discusses the components and overall structure of a database management system (DBMS). It describes the various levels of database architecture including the physical, logical, and external levels.
2. The key components of a DBMS include users, a query processor, storage manager, and data structures. The query processor consists of a DML compiler, DDL interpreter, and query evaluation engine. The storage manager includes modules for authorization, transactions, file management, and buffering.
3. Data models help represent the design of a database and describe entities, attributes, relationships, and constraints. Common models include the entity-relationship model and object-oriented model.
This document provides an introduction to database management systems (DBMS). It defines key DBMS concepts like databases, data, schemas, and instances. It describes typical DBMS functionality like defining databases, loading data, querying data, and concurrent access. It introduces data models, DBMS languages, database users, and advantages of the database approach. It also discusses the hierarchical and network data models. The document aims to give an overview of fundamental DBMS concepts and components.
The document discusses different database concepts:
1) A database is a collection of organized data that can be easily retrieved, inserted, and deleted. Database management systems (DBMS) like MySQL and Oracle are software used to manage databases.
2) The two main data models are the relational model, which organizes data into tables and relations, and the object-oriented model, which represents data as objects with properties and methods.
3) DBMS provide advantages like data sharing, backup/recovery, security, and independence between data and applications. However, they also have disadvantages such as higher costs and complexity.
This document provides information about a database management systems (DBMS) course offered by the Department of Computer Science & Engineering at Cambridge University. The course objectives are to provide a strong foundation in database concepts, practice SQL programming, demonstrate transactions and concurrency, and design database applications. Course outcomes include identifying and defining database objects, using SQL, designing simple databases, and developing applications. The course modules cover topics such as conceptual modeling, the relational model, SQL, normalization, transactions, and recovery protocols. Required textbooks are also listed.
The document discusses database management systems (DBMS). It covers topics such as the introduction to databases, components of a DBMS, and applications of DBMS. It defines a DBMS as a system software used to create and manage databases. A DBMS provides users with tools to define, manipulate, retrieve, and manage data. It also discusses the different types of databases like hierarchical, network, relational, and object-oriented databases.
This document provides an overview of database management systems and the entity relationship model. It discusses:
1) The components and purpose of a DBMS including data storage and management, data independence, and concurrent access.
2) Database users including administrators, designers, end users, and application developers.
3) The three schema architecture including the internal, conceptual, and external levels and mappings between them.
4) Entity relationship modeling concepts such as entities, attributes, relationships and constraints which allow conceptualization of data.
The document discusses the architecture and components of a database management system (DBMS). It describes the three levels of abstraction in a DBMS - physical, logical, and view levels. It also explains the roles of different types of database users and the responsibilities of a database administrator. The key components of a DBMS discussed include the storage manager, query processor, and functions like data storage, security management, and database access.
CS3270 - DATABASE SYSTEM - Lecture (1)Dilawar Khan
This document outlines the key topics to be covered in a database course, including: understanding database concepts and the relational model, learning SQL for data manipulation and definition, database design techniques like entity-relationship modeling and normalization, and hands-on experience with Microsoft SQL Server. The course objectives are to help students understand databases and DBMS systems, apply relational concepts and SQL, and be able to design database applications. The document also provides an introduction to databases by comparing traditional file-based systems with the database approach.
1. The document discusses the components and overall structure of a database management system (DBMS). It describes the various levels of database architecture including the physical, logical, and external levels.
2. The key components of a DBMS include users, a query processor, storage manager, and data structures. The query processor consists of a DML compiler, DDL interpreter, and query evaluation engine. The storage manager includes modules for authorization, transactions, file management, and buffering.
3. Data models help represent the design of a database and describe entities, attributes, relationships, and constraints. Common models include the entity-relationship model and object-oriented model.
This document provides an introduction to database management systems (DBMS). It defines key DBMS concepts like databases, data, schemas, and instances. It describes typical DBMS functionality like defining databases, loading data, querying data, and concurrent access. It introduces data models, DBMS languages, database users, and advantages of the database approach. It also discusses the hierarchical and network data models. The document aims to give an overview of fundamental DBMS concepts and components.
The document discusses different database concepts:
1) A database is a collection of organized data that can be easily retrieved, inserted, and deleted. Database management systems (DBMS) like MySQL and Oracle are software used to manage databases.
2) The two main data models are the relational model, which organizes data into tables and relations, and the object-oriented model, which represents data as objects with properties and methods.
3) DBMS provide advantages like data sharing, backup/recovery, security, and independence between data and applications. However, they also have disadvantages such as higher costs and complexity.
This document provides information about a database management systems (DBMS) course offered by the Department of Computer Science & Engineering at Cambridge University. The course objectives are to provide a strong foundation in database concepts, practice SQL programming, demonstrate transactions and concurrency, and design database applications. Course outcomes include identifying and defining database objects, using SQL, designing simple databases, and developing applications. The course modules cover topics such as conceptual modeling, the relational model, SQL, normalization, transactions, and recovery protocols. Required textbooks are also listed.
The document discusses database management systems (DBMS). It covers topics such as the introduction to databases, components of a DBMS, and applications of DBMS. It defines a DBMS as a system software used to create and manage databases. A DBMS provides users with tools to define, manipulate, retrieve, and manage data. It also discusses the different types of databases like hierarchical, network, relational, and object-oriented databases.
This document provides an overview of database management systems and the entity relationship model. It discusses:
1) The components and purpose of a DBMS including data storage and management, data independence, and concurrent access.
2) Database users including administrators, designers, end users, and application developers.
3) The three schema architecture including the internal, conceptual, and external levels and mappings between them.
4) Entity relationship modeling concepts such as entities, attributes, relationships and constraints which allow conceptualization of data.
The document discusses the architecture and components of a database management system (DBMS). It describes the three levels of abstraction in a DBMS - physical, logical, and view levels. It also explains the roles of different types of database users and the responsibilities of a database administrator. The key components of a DBMS discussed include the storage manager, query processor, and functions like data storage, security management, and database access.
The document discusses databases and database management systems. It provides examples of common database applications like banking, universities, sales, and airlines. It defines what a database is, the role of a database management system, and examples of DBMS software. It also compares the advantages and disadvantages of using a database system versus a traditional file system to store data. Key benefits of a DBMS include supporting complex queries, controlling redundancy and consistency, handling concurrent access from multiple users, and providing security and data recovery.
Attributes are properties or characteristics that describe entities. In the EMPLOYEE entity example, attributes could include:
- Employee ID
- Name
- Date of birth
- Address
- Salary
These attributes describe and provide information about each employee entity instance. Attributes help define and differentiate entity instances from each other.
The document discusses database essentials including database management systems, database applications, the purpose of database systems, data models, database languages, database architecture, and the relational data model. Specifically, it defines what a DBMS is, provides examples of common database applications, describes why databases were developed to address limitations of file processing systems, outlines several data models including the relational model, discusses database languages for defining and manipulating data, presents the client-server architecture of database systems, and explains key concepts of the relational model including tables, tuples, attributes, relations, and domains.
Introduction to Database Management System.pdfbiswajit62002
This document discusses database management systems and business rules. It defines key terms like data, database, DBMS and describes their purposes. It explains different levels of data abstraction including physical, logical and view levels. It also defines business rules as statements that impose constraints on business processes. Examples of business rule types and characteristics of good rules are provided. Finally, sources of business rules and benefits of explicitly defining them are summarized.
This document provides an outline for a course on databases and database users. It introduces key concepts about databases including what a database is, database properties, database management systems, actors involved with databases like administrators and designers, advantages of databases over file systems, and common database applications. The outline covers topics that will be taught like introduction to PHP and MySQL, how to code applications with databases, and how to perform common tasks with databases.
Chapter-1 Introduction to Database Management SystemsKunal Anand
This chapter discusses the fundamental concepts of DBMS like limitations of the traditional file processing systems, characteristics of the database approach, different types of databases and users, advantages and disadvantages of DBMS.
This document provides an overview of relational database management systems (RDBMS). It defines key terms like database, database management system, and data models. It describes the characteristics of a modern DBMS like using real-world entities, normalization to reduce redundancy, and query languages. The document also outlines the components of a database system including users, applications, the DBMS software, and the database itself. It explains common database architectures like single-tier, two-tier, and three-tier designs. Finally, it introduces some historical data models used in database design like the entity-relationship model, relational model, hierarchical model, and network model.
The document provides an introduction to basic concepts of database systems including definitions of data, information, and knowledge. It discusses data/information processing and what a database and DBMS are. The main characteristics of the database approach are described including self-describing nature, insulation between programs and data, data abstraction, and support of multiple views. The document also discusses database users including actors on the scene like DBAs and end users, and workers behind the scene like DBMS designers. Finally, it briefly introduces some common data models like hierarchical, network, entity-relationship, relational, and object-oriented models.
Data base chapter 2 | detail about the topichoseg78377
This document discusses database management systems and databases. It begins by introducing database users such as administrators, designers, end users, and analysts. It then covers the advantages of using a database approach such as controlling redundancy, restricting access, and enforcing integrity constraints. Finally, it briefly discusses the history of database technology and some examples of database applications.
This document discusses key concepts related to databases and database management systems (DBMS). It defines a database as an organized collection of data, and a DBMS as software that manages databases. The document then discusses different types of database users, the purpose of using a DBMS over file systems, different data models, and SQL statements for defining database structure and manipulating data.
The document discusses key concepts related to databases and database management systems (DBMS). It defines what a database is - a collection of interrelated data organized for efficient retrieval, insertion and deletion. It describes characteristics of the database approach like self-describing nature, insulation between programs and data, support of multiple views, and sharing of data. The document also discusses database management systems, advantages and disadvantages of DBMS, types of DBMS like hierarchical, network, relational and object-oriented, database architectures, types of databases like centralized and distributed, data models, and defines what a database schema is.
Overview, Database System vs File System, Database System Concept and
Architecture, Data Model Schema and Instances, Data Independence and Database Language and
Interfaces, Data Definitions Language, DML, Overall Database Structure. Data Modeling Using the
Entity Relationship Model: ER Model Concepts, Notation for ER Diagram, Mapping Constraints,
Keys, Concepts of Super Key, Candidate Key, Primary Key, Generalization, Aggregation,
Reduction of an ER Diagrams to Tables, Extended ER Model, Relationship of Higher Degree.
CP 121 introduces database systems. The lecture covers file-based systems, the database approach, common database uses, users, DBMS components and functions, and advantages and disadvantages of databases. Key points include: File-based systems are limited but the database approach offers data sharing and consistency. A DBMS manages data storage, transactions, integrity, security and more. Database users include administrators, designers, developers and end users who access data through applications.
This document provides an overview of a Relational Database Management System (RDBMS) unit prepared by D.GAYA, an Assistant Professor of Computer Science at Pondicherry University Community College. It defines key RDBMS concepts and components, including database languages, the query processor, runtime and database managers, and the database engine. It also outlines benefits of RDBMS such as data security, sharing, integration and abstraction/independence. Applications mentioned include following ACID properties, multi-user access, multiple views, and security features. Finally, it briefly introduces data modeling and different data models.
The document discusses key concepts related to databases including data, information, database management systems (DBMS), database design, and entity relationship modeling. It defines data as raw unorganized facts and information as organized, meaningful data. A database is a collection of organized data that can be easily accessed, managed and updated. Effective database design involves conceptual, logical and physical data modeling to structure data and relationships. The entity relationship model uses entities, attributes, and relationships to graphically represent data structures and relationships.
The document provides an introduction to databases and database management systems (DBMS). It discusses the limitations of traditional file-based data storage systems, including data duplication, separation, and incompatibility between files. It then describes how a DBMS addresses these issues through a centralized database that can be shared and accessed. Key components of a DBMS environment include hardware, software, data, procedures, and personnel to design, manage and use the database. Advantages of DBMS include data consistency and reduced redundancy, while disadvantages include increased complexity, costs and potential impact of failures.
1. The document discusses the differences between a DBMS and a file system. A DBMS provides features like crash recovery, concurrent access control, and efficient data storage and retrieval that a file system does not provide.
2. It describes the three schema architecture of a database system including the physical, conceptual, and external schemas.
3. It provides an overview of the components of a database system including the storage manager, query processor, and different types of users.
Prerequisies of DBMS
Course Objectives of DBMS
Syllabus
What is the meaning of data and database
DBMS
History of DBMS
Different Databases available in Market
Storage areas
Why to Learn DBMS?
Peoples who work with Databases
Applications of DBMS
This document provides an overview of database management systems and the relational data model. It discusses the history and components of DBMS, including data models like entity-relationship and relational models. The relational model represents data as mathematical tuples organized into tables. Key concepts explained include tables, tuples, schemas, and integrity constraints. Database users and common DBMS architectures are also summarized.
Database Systems(DBS) Or DATABASE MANAGEMENT SYSTEMmoronfolabukunmi
Here are some other potential disadvantages of DBMS:
- Complexity: DBMS can be complex to design, implement and maintain compared to simpler file-based systems. This complexity increases costs.
- Performance issues: Large DBMS may have performance bottlenecks due to their complexity. Complex queries and transactions can impact performance.
- Dependence on DBA skills: Effective use of DBMS requires skilled database administrators to design, implement and maintain the system properly. Lack of good DBA skills can compromise the whole system.
- Security risks: As a central system storing critical data, DBMS needs strong security. However, security vulnerabilities in the DBMS software or configuration may lead to data thefts or losses.
The document discusses databases and database management systems. It provides examples of common database applications like banking, universities, sales, and airlines. It defines what a database is, the role of a database management system, and examples of DBMS software. It also compares the advantages and disadvantages of using a database system versus a traditional file system to store data. Key benefits of a DBMS include supporting complex queries, controlling redundancy and consistency, handling concurrent access from multiple users, and providing security and data recovery.
Attributes are properties or characteristics that describe entities. In the EMPLOYEE entity example, attributes could include:
- Employee ID
- Name
- Date of birth
- Address
- Salary
These attributes describe and provide information about each employee entity instance. Attributes help define and differentiate entity instances from each other.
The document discusses database essentials including database management systems, database applications, the purpose of database systems, data models, database languages, database architecture, and the relational data model. Specifically, it defines what a DBMS is, provides examples of common database applications, describes why databases were developed to address limitations of file processing systems, outlines several data models including the relational model, discusses database languages for defining and manipulating data, presents the client-server architecture of database systems, and explains key concepts of the relational model including tables, tuples, attributes, relations, and domains.
Introduction to Database Management System.pdfbiswajit62002
This document discusses database management systems and business rules. It defines key terms like data, database, DBMS and describes their purposes. It explains different levels of data abstraction including physical, logical and view levels. It also defines business rules as statements that impose constraints on business processes. Examples of business rule types and characteristics of good rules are provided. Finally, sources of business rules and benefits of explicitly defining them are summarized.
This document provides an outline for a course on databases and database users. It introduces key concepts about databases including what a database is, database properties, database management systems, actors involved with databases like administrators and designers, advantages of databases over file systems, and common database applications. The outline covers topics that will be taught like introduction to PHP and MySQL, how to code applications with databases, and how to perform common tasks with databases.
Chapter-1 Introduction to Database Management SystemsKunal Anand
This chapter discusses the fundamental concepts of DBMS like limitations of the traditional file processing systems, characteristics of the database approach, different types of databases and users, advantages and disadvantages of DBMS.
This document provides an overview of relational database management systems (RDBMS). It defines key terms like database, database management system, and data models. It describes the characteristics of a modern DBMS like using real-world entities, normalization to reduce redundancy, and query languages. The document also outlines the components of a database system including users, applications, the DBMS software, and the database itself. It explains common database architectures like single-tier, two-tier, and three-tier designs. Finally, it introduces some historical data models used in database design like the entity-relationship model, relational model, hierarchical model, and network model.
The document provides an introduction to basic concepts of database systems including definitions of data, information, and knowledge. It discusses data/information processing and what a database and DBMS are. The main characteristics of the database approach are described including self-describing nature, insulation between programs and data, data abstraction, and support of multiple views. The document also discusses database users including actors on the scene like DBAs and end users, and workers behind the scene like DBMS designers. Finally, it briefly introduces some common data models like hierarchical, network, entity-relationship, relational, and object-oriented models.
Data base chapter 2 | detail about the topichoseg78377
This document discusses database management systems and databases. It begins by introducing database users such as administrators, designers, end users, and analysts. It then covers the advantages of using a database approach such as controlling redundancy, restricting access, and enforcing integrity constraints. Finally, it briefly discusses the history of database technology and some examples of database applications.
This document discusses key concepts related to databases and database management systems (DBMS). It defines a database as an organized collection of data, and a DBMS as software that manages databases. The document then discusses different types of database users, the purpose of using a DBMS over file systems, different data models, and SQL statements for defining database structure and manipulating data.
The document discusses key concepts related to databases and database management systems (DBMS). It defines what a database is - a collection of interrelated data organized for efficient retrieval, insertion and deletion. It describes characteristics of the database approach like self-describing nature, insulation between programs and data, support of multiple views, and sharing of data. The document also discusses database management systems, advantages and disadvantages of DBMS, types of DBMS like hierarchical, network, relational and object-oriented, database architectures, types of databases like centralized and distributed, data models, and defines what a database schema is.
Overview, Database System vs File System, Database System Concept and
Architecture, Data Model Schema and Instances, Data Independence and Database Language and
Interfaces, Data Definitions Language, DML, Overall Database Structure. Data Modeling Using the
Entity Relationship Model: ER Model Concepts, Notation for ER Diagram, Mapping Constraints,
Keys, Concepts of Super Key, Candidate Key, Primary Key, Generalization, Aggregation,
Reduction of an ER Diagrams to Tables, Extended ER Model, Relationship of Higher Degree.
CP 121 introduces database systems. The lecture covers file-based systems, the database approach, common database uses, users, DBMS components and functions, and advantages and disadvantages of databases. Key points include: File-based systems are limited but the database approach offers data sharing and consistency. A DBMS manages data storage, transactions, integrity, security and more. Database users include administrators, designers, developers and end users who access data through applications.
This document provides an overview of a Relational Database Management System (RDBMS) unit prepared by D.GAYA, an Assistant Professor of Computer Science at Pondicherry University Community College. It defines key RDBMS concepts and components, including database languages, the query processor, runtime and database managers, and the database engine. It also outlines benefits of RDBMS such as data security, sharing, integration and abstraction/independence. Applications mentioned include following ACID properties, multi-user access, multiple views, and security features. Finally, it briefly introduces data modeling and different data models.
The document discusses key concepts related to databases including data, information, database management systems (DBMS), database design, and entity relationship modeling. It defines data as raw unorganized facts and information as organized, meaningful data. A database is a collection of organized data that can be easily accessed, managed and updated. Effective database design involves conceptual, logical and physical data modeling to structure data and relationships. The entity relationship model uses entities, attributes, and relationships to graphically represent data structures and relationships.
The document provides an introduction to databases and database management systems (DBMS). It discusses the limitations of traditional file-based data storage systems, including data duplication, separation, and incompatibility between files. It then describes how a DBMS addresses these issues through a centralized database that can be shared and accessed. Key components of a DBMS environment include hardware, software, data, procedures, and personnel to design, manage and use the database. Advantages of DBMS include data consistency and reduced redundancy, while disadvantages include increased complexity, costs and potential impact of failures.
1. The document discusses the differences between a DBMS and a file system. A DBMS provides features like crash recovery, concurrent access control, and efficient data storage and retrieval that a file system does not provide.
2. It describes the three schema architecture of a database system including the physical, conceptual, and external schemas.
3. It provides an overview of the components of a database system including the storage manager, query processor, and different types of users.
Prerequisies of DBMS
Course Objectives of DBMS
Syllabus
What is the meaning of data and database
DBMS
History of DBMS
Different Databases available in Market
Storage areas
Why to Learn DBMS?
Peoples who work with Databases
Applications of DBMS
This document provides an overview of database management systems and the relational data model. It discusses the history and components of DBMS, including data models like entity-relationship and relational models. The relational model represents data as mathematical tuples organized into tables. Key concepts explained include tables, tuples, schemas, and integrity constraints. Database users and common DBMS architectures are also summarized.
Database Systems(DBS) Or DATABASE MANAGEMENT SYSTEMmoronfolabukunmi
Here are some other potential disadvantages of DBMS:
- Complexity: DBMS can be complex to design, implement and maintain compared to simpler file-based systems. This complexity increases costs.
- Performance issues: Large DBMS may have performance bottlenecks due to their complexity. Complex queries and transactions can impact performance.
- Dependence on DBA skills: Effective use of DBMS requires skilled database administrators to design, implement and maintain the system properly. Lack of good DBA skills can compromise the whole system.
- Security risks: As a central system storing critical data, DBMS needs strong security. However, security vulnerabilities in the DBMS software or configuration may lead to data thefts or losses.
Embedded machine learning-based road conditions and driving behavior monitoringIJECEIAES
Car accident rates have increased in recent years, resulting in losses in human lives, properties, and other financial costs. An embedded machine learning-based system is developed to address this critical issue. The system can monitor road conditions, detect driving patterns, and identify aggressive driving behaviors. The system is based on neural networks trained on a comprehensive dataset of driving events, driving styles, and road conditions. The system effectively detects potential risks and helps mitigate the frequency and impact of accidents. The primary goal is to ensure the safety of drivers and vehicles. Collecting data involved gathering information on three key road events: normal street and normal drive, speed bumps, circular yellow speed bumps, and three aggressive driving actions: sudden start, sudden stop, and sudden entry. The gathered data is processed and analyzed using a machine learning system designed for limited power and memory devices. The developed system resulted in 91.9% accuracy, 93.6% precision, and 92% recall. The achieved inference time on an Arduino Nano 33 BLE Sense with a 32-bit CPU running at 64 MHz is 34 ms and requires 2.6 kB peak RAM and 139.9 kB program flash memory, making it suitable for resource-constrained embedded systems.
Software Engineering and Project Management - Introduction, Modeling Concepts...Prakhyath Rai
Introduction, Modeling Concepts and Class Modeling: What is Object orientation? What is OO development? OO Themes; Evidence for usefulness of OO development; OO modeling history. Modeling
as Design technique: Modeling, abstraction, The Three models. Class Modeling: Object and Class Concept, Link and associations concepts, Generalization and Inheritance, A sample class model, Navigation of class models, and UML diagrams
Building the Analysis Models: Requirement Analysis, Analysis Model Approaches, Data modeling Concepts, Object Oriented Analysis, Scenario-Based Modeling, Flow-Oriented Modeling, class Based Modeling, Creating a Behavioral Model.
Electric vehicle and photovoltaic advanced roles in enhancing the financial p...IJECEIAES
Climate change's impact on the planet forced the United Nations and governments to promote green energies and electric transportation. The deployments of photovoltaic (PV) and electric vehicle (EV) systems gained stronger momentum due to their numerous advantages over fossil fuel types. The advantages go beyond sustainability to reach financial support and stability. The work in this paper introduces the hybrid system between PV and EV to support industrial and commercial plants. This paper covers the theoretical framework of the proposed hybrid system including the required equation to complete the cost analysis when PV and EV are present. In addition, the proposed design diagram which sets the priorities and requirements of the system is presented. The proposed approach allows setup to advance their power stability, especially during power outages. The presented information supports researchers and plant owners to complete the necessary analysis while promoting the deployment of clean energy. The result of a case study that represents a dairy milk farmer supports the theoretical works and highlights its advanced benefits to existing plants. The short return on investment of the proposed approach supports the paper's novelty approach for the sustainable electrical system. In addition, the proposed system allows for an isolated power setup without the need for a transmission line which enhances the safety of the electrical network
Optimizing Gradle Builds - Gradle DPE Tour Berlin 2024Sinan KOZAK
Sinan from the Delivery Hero mobile infrastructure engineering team shares a deep dive into performance acceleration with Gradle build cache optimizations. Sinan shares their journey into solving complex build-cache problems that affect Gradle builds. By understanding the challenges and solutions found in our journey, we aim to demonstrate the possibilities for faster builds. The case study reveals how overlapping outputs and cache misconfigurations led to significant increases in build times, especially as the project scaled up with numerous modules using Paparazzi tests. The journey from diagnosing to defeating cache issues offers invaluable lessons on maintaining cache integrity without sacrificing functionality.
Introduction- e - waste – definition - sources of e-waste– hazardous substances in e-waste - effects of e-waste on environment and human health- need for e-waste management– e-waste handling rules - waste minimization techniques for managing e-waste – recycling of e-waste - disposal treatment methods of e- waste – mechanism of extraction of precious metal from leaching solution-global Scenario of E-waste – E-waste in India- case studies.
Use PyCharm for remote debugging of WSL on a Windo cf5c162d672e4e58b4dde5d797...shadow0702a
This document serves as a comprehensive step-by-step guide on how to effectively use PyCharm for remote debugging of the Windows Subsystem for Linux (WSL) on a local Windows machine. It meticulously outlines several critical steps in the process, starting with the crucial task of enabling permissions, followed by the installation and configuration of WSL.
The guide then proceeds to explain how to set up the SSH service within the WSL environment, an integral part of the process. Alongside this, it also provides detailed instructions on how to modify the inbound rules of the Windows firewall to facilitate the process, ensuring that there are no connectivity issues that could potentially hinder the debugging process.
The document further emphasizes on the importance of checking the connection between the Windows and WSL environments, providing instructions on how to ensure that the connection is optimal and ready for remote debugging.
It also offers an in-depth guide on how to configure the WSL interpreter and files within the PyCharm environment. This is essential for ensuring that the debugging process is set up correctly and that the program can be run effectively within the WSL terminal.
Additionally, the document provides guidance on how to set up breakpoints for debugging, a fundamental aspect of the debugging process which allows the developer to stop the execution of their code at certain points and inspect their program at those stages.
Finally, the document concludes by providing a link to a reference blog. This blog offers additional information and guidance on configuring the remote Python interpreter in PyCharm, providing the reader with a well-rounded understanding of the process.
Discover the latest insights on Data Driven Maintenance with our comprehensive webinar presentation. Learn about traditional maintenance challenges, the right approach to utilizing data, and the benefits of adopting a Data Driven Maintenance strategy. Explore real-world examples, industry best practices, and innovative solutions like FMECA and the D3M model. This presentation, led by expert Jules Oudmans, is essential for asset owners looking to optimize their maintenance processes and leverage digital technologies for improved efficiency and performance. Download now to stay ahead in the evolving maintenance landscape.
2. BITS Pilani, Pilani Campus
M1 - Introduction and Overview of
Database Systems
•Introduction to Database Management System
•Characteristics of database approach
•Database users
•Advantages of using DBMS
•Data Models , Schema,Instances and DataBase State
•Three – Schema Architecture and Data Independence
•DataBase System Environment
•DBMS Architecture
3. BITS Pilani, Pilani Campus
Data and Database
3
• A database is a collection of related data.
• By data, we mean known facts that can be recorded and that
have implicit meaning.
• For example, consider the names, telephone numbers, and
addresses of people.
• A database represents some aspect of the real world, sometimes
called the miniworld or the universe of discourse (UoD).
• A database is a logically coherent collection of data with some
inherent meaning.
• A database is designed, built, and populated with data for a
specific purpose.
4. BITS Pilani, Pilani Campus
DataBase Management Systems
• A DataBase Management System (DBMS) is a collection of
programs that enables users to create and maintain a database.
• The DBMS is a general-purpose software system that facilitates
the processes of defining, constructing, manipulating, and
sharing databases among various users and applications.
• Defining a database involves specifying the data types,
structures, and constraints of the data to be stored in the
database.
The database definition or descriptive information is also
stored by the DBMS in the form of a database catalog or
dictionary; it is called meta-data.
4
5. BITS Pilani, Pilani Campus
DataBase Management Systems
5
• Constructing the database is the process of
storing the data on some storage medium that is
controlled by the DBMS.
• Manipulating a database includes functions such
as querying the database to retrieve specific
data, updating the database to reflect changes in
the miniworld, and generating reports from the
data.
• Sharing a database allows multiple users and
programs to access the database simultaneously.
7. BITS Pilani, Pilani Campus
Characteristics of DataBase System
• Self-describing nature of a database system
• Insulation between programs and data, and
data abstraction
• Support of multiple views of the data
• Sharing of data and multiuser transaction
processing
7
8. BITS Pilani, Pilani Campus
DataBase Users
DataBase Administrators
•In a database environment, the primary resource is the
database itself, and the secondary resource is the
DBMS and related software.
• Administering these resources is the responsibility of
the DataBase Administrator (DBA).
•The DBA is responsible for authorizing access to the
database, coordinating and monitoring its use, and
acquiring software and hardware resources as needed.
•The DBA is accountable for problems such as security
breaches and poor system response time.
9. BITS Pilani, Pilani Campus
Database designers
•They are responsible for identifying the data to be stored in the
database and for choosing appropriate structures to represent
and store this data.
• These tasks are mostly undertaken before the database is
actually implemented and populated with data.
•It is the responsibility of database designers to communicate
with all prospective database users in order to understand their
requirements and to create a design that meets these
requirements.
• In many cases, the designers are on the staff of the DBA and
may be assigned other staff responsibilities after the database
design is completed. 9
DataBase Users
10. BITS Pilani, Pilani Campus
DataBase Users
End Users
•Casual end users occasionally access the database, but they
may need different information each time. They use a
sophisticated database query language to specify their
requests and are typically middle- or high-level managers or
other occasional browsers.
•Naive or parametric end users make up a sizable portion of
database end users. Their main job function revolves
around constantly querying and updating the database,
using standard types of queries and updates—called
canned transactions—that have been carefully
programmed and tested.
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11. BITS Pilani, Pilani Campus
DataBase Users
End Users
•Sophisticated end users include engineers, scientists,
business analysts, and others who thoroughly familiarize
themselves with the facilities of the DBMS in order to
implement their own applications to meet their complex
requirements.
•Standalone users maintain personal databases by using
ready-made program packages that provide easy-to-use
menu-based or graphics-based interfaces.
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DataBase Users
System analysts
•System Analysts determine the requirements of end users,
especially naive and parametric end users, and develop
specifications for standard canned transactions that meet
these requirements.
•Application programmers implement these specifications as
programs; then they test, debug, document, and maintain
these canned transactions.
•Such analysts and programmers—commonly referred to as
software developers or software engineers—should be
familiar with the full range of capabilities provided by the
DBMS to accomplish their tasks.
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Advantages of a DBMS
• Controlling Redundancy
• Restricting Unauthorized Access
• Providing Persistant Storage for Program Objects
• Efficient Storage Structure and Query Processing
• Providing Multiple User Interfaces
• Representing Complex Relationships among Data
• Enforcing Integrity Constraints
• Permitting Inferencing and Actions Using Rules
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Disadvantages of using DBMS
• High initial investment in hardware, software, and training.
• The generality that a DBMS provides for defining and processing
data.
• Overhead for providing security, concurrency control, recovery,
and integrity functions.
Advantages of Traditional File System
• Simple, well-defined database applications that are not expected
to change at all.
• Stringent, real-time requirements for some application programs
that may not be met because of DBMS overhead.
• Embedded systems with limited storage capacity, where a
general-purpose DBMS would not fit.
• No multiple-user access to data.
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15. BITS Pilani, Pilani Campus
Data Models
• Data abstraction generally refers to the suppression of
details of data organization and storage, and the
highlighting of the essential features for an improved
understanding of data.
• Data model—a collection of concepts that can be used
to describe the structure of a database—provides the
necessary means to achieve this abstraction.
By structure of a database we mean the data types,
relationships, and constraints that apply to the data .
Most data models also include a set of basic operations
for specifying retrievals and updates on the database.
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Categories of Data Models
• High-level or conceptual data models provide concepts
that are close to the way many users perceive data;
• Low-level or physical data models provide concepts that
describe the details of how data is stored on the
computer storage media, typically magnetic disks.
Concepts provided by low-level data models are
generally meant for computer specialists, not for end
users.
• Between these two extremes is a class of
representational(or implementation)data models,which
provide concepts that may be easily understood by end
users but that are not too far removed from the way data
is organized in computer storage. 16
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Categories of Data Models
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• Conceptual data models use concepts such as entities,
attributes, and relationships.
• An entity represents a real-world object or concept,
such as an employee or a project from the miniworld
that is described in the database.
• An attribute represents some property of interest that
further describes an entity, such as the employee’s
name or salary.
• A relationship among two or more entities represents
an association among the entities, for example, a
works-on relationship between an employee and a
project.
18. BITS Pilani, Pilani Campus
Categories of Data Models
• Representational or implementation data models
are the models used most frequently in
traditional commercial DBMSs.
• These include the widely used relational data
model, as well as the so-called legacy data
models—the network and hierarchical models.
• Representational data models represent data by
using record structures and hence are sometimes
called record-based data models.
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• Object data models are also frequently utilized as
high-level conceptual models, particularly in the
software engineering domain.
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Categories of Data Models
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Schemas,Instances and DataBase
State
• The description of a database is called the database
schema, which is specified during database design
and is not expected to change frequently.
• A displayed schema is called a schema diagram.
• The data in the database at a particular moment in
time is called a database state or snapshot.
• It is also called the current set of occurrences or
instances in the database. In a given database state,
each schema construct has its own current set of
instances.
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Three – Schema Architecture
The three-schema architecture, was proposed to help achieve
and visualize the characteristics of DBMS.
1.The internal level has an internal schema, which describes
the physical storage structure of the database.
2. The conceptual level has a conceptual schema, which
describes the structure of the whole database for a community of
users. The conceptual schema hides the details of physical
storage structures and concentrates on describing entities, data
types, relationships, user operations, and constraints.
3. The external or view level Each external schema describes
the part of the database that a particular user group is interested
in and hides the rest of the database from that user group.
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Data Independence
• The three-schema architecture can be used to explain the
concept of data independence, which can be defined as the
capacity to change the schema at one level of a database
system without having to change the schema at the next
higher level.
We can define two types of data independence:
• Logical data independence is the capacity to change the
conceptual schema without having to change external
schemas or application programs.
• Physical data independence is the capacity to change the
internal schema without having to change the conceptual
schema. Hence, the external schemas need not be changed as
well. 23