This document discusses data, information, databases, database management systems (DBMS), and the architecture of DBMS. It defines data as raw unorganized facts and information as processed data that provides meaning. A database is a shared collection of interrelated data designed to meet an organization's information needs. A DBMS is a collection of programs used to create and maintain a database. The document then describes the components of a typical DBMS architecture including the query processor, file manager, data manager, and data dictionary. It also discusses database users such as administrators, designers, analysts, and various types of end users.
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.
Introduction to database systems
Database size and complexity
What is DBMS?
Characteristics of Database approach
Users of database
Advantages of using database system
Database systems evolution
When not to use database systems
This document defines database and DBMS, describes their advantages over file-based systems like data independence and integrity. It explains database system components and architecture including physical and logical data models. Key aspects covered are data definition language to create schemas, data manipulation language to query data, and transaction management to handle concurrent access and recovery. It also provides a brief history of database systems and discusses database users and the critical role of database administrators.
This document defines database and DBMS, describes their advantages over file-based systems like data independence and integrity. It explains database system components and architecture including physical and logical data models. Key aspects covered are data definition language to create schemas, data manipulation language to query data, and transaction management to handle concurrent access and recovery. It also provides a brief history of database systems and discusses database users and the critical role of database administrators.
The document provides an introduction to database management systems (DBMS) and database models. It defines key terms like data, database, DBMS, file system vs DBMS. It describes the evolution of DBMS from 1960 onwards and different database models like hierarchical, network and relational models. It also discusses the roles of different people who work with databases like database designers, administrators, application programmers and end users.
This chapter introduces databases and database management systems (DBMS). It defines key concepts like data, database, and DBMS. It also provides examples of database applications and typical DBMS functionality like defining databases, loading data, and concurrent access. The chapter concludes by discussing the advantages and limitations of using a DBMS.
The document discusses database management systems (DBMS). It defines a database as a collection of related data and describes a DBMS as software that enables users to create, maintain and share databases. It provides an example of a university database with files for students, courses, grades and prerequisites. It outlines key characteristics of the database approach such as self-describing nature, insulation between programs and data, support of multiple views, and sharing of data.
Database Management System IntroductionSmriti Jain
The document discusses key concepts in databases including:
- Data refers to raw facts and details, while entities are things that data describes with attributes.
- A record combines all details of an entity, files group related records, and a database collects logically related files and records.
- A database management system (DBMS) enables users to define, create and maintain databases and provides flexible data management.
- DBMS benefits include centralized data control, consistency, sharing, and independence from 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.
Introduction to database systems
Database size and complexity
What is DBMS?
Characteristics of Database approach
Users of database
Advantages of using database system
Database systems evolution
When not to use database systems
This document defines database and DBMS, describes their advantages over file-based systems like data independence and integrity. It explains database system components and architecture including physical and logical data models. Key aspects covered are data definition language to create schemas, data manipulation language to query data, and transaction management to handle concurrent access and recovery. It also provides a brief history of database systems and discusses database users and the critical role of database administrators.
This document defines database and DBMS, describes their advantages over file-based systems like data independence and integrity. It explains database system components and architecture including physical and logical data models. Key aspects covered are data definition language to create schemas, data manipulation language to query data, and transaction management to handle concurrent access and recovery. It also provides a brief history of database systems and discusses database users and the critical role of database administrators.
The document provides an introduction to database management systems (DBMS) and database models. It defines key terms like data, database, DBMS, file system vs DBMS. It describes the evolution of DBMS from 1960 onwards and different database models like hierarchical, network and relational models. It also discusses the roles of different people who work with databases like database designers, administrators, application programmers and end users.
This chapter introduces databases and database management systems (DBMS). It defines key concepts like data, database, and DBMS. It also provides examples of database applications and typical DBMS functionality like defining databases, loading data, and concurrent access. The chapter concludes by discussing the advantages and limitations of using a DBMS.
The document discusses database management systems (DBMS). It defines a database as a collection of related data and describes a DBMS as software that enables users to create, maintain and share databases. It provides an example of a university database with files for students, courses, grades and prerequisites. It outlines key characteristics of the database approach such as self-describing nature, insulation between programs and data, support of multiple views, and sharing of data.
Database Management System IntroductionSmriti Jain
The document discusses key concepts in databases including:
- Data refers to raw facts and details, while entities are things that data describes with attributes.
- A record combines all details of an entity, files group related records, and a database collects logically related files and records.
- A database management system (DBMS) enables users to define, create and maintain databases and provides flexible data management.
- DBMS benefits include centralized data control, consistency, sharing, and independence from applications.
The document provides an introduction to database systems. It defines key terms like database, database management system (DBMS), and database system. It describes the characteristics of database systems and some advantages over file-based systems, like reduced redundancy and supporting multiple users. It also outlines typical DBMS functionality, components of a database system environment, different types of database users, and the historical development of database technology.
This document provides an overview of database management systems (DBMS). It discusses what a DBMS is, its architecture and components. A DBMS allows for centralized control of data to reduce redundancy and inconsistencies. It also provides data sharing, integrity, security and recovery mechanisms. The document describes the entity-relationship, network, relational and object-oriented data models. It also discusses the three-tier architecture of a DBMS and the concept of data abstraction through the three schema architecture.
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 presentation discusses databases and database management systems. It begins by defining data and information, and explaining how databases store both raw data and metadata to facilitate sharing and management. The presentation then covers the components and functions of a database system, including the database, DBMS software, operating system, and users. It emphasizes the importance of database design and explains how databases improved upon early file systems. In closing, it summarizes that databases integrate data for improved access and consistency, while database management systems perform functions like data storage, security, and backup recovery.
The document provides an overview of database management systems (DBMS). It discusses what a database is, the purpose of a DBMS, different types of database users, and key concepts related to database systems and architecture. Specifically, it covers data models, schemas and instances, the three-schema DBMS architecture which separates the physical, conceptual and external levels, and the importance of data independence which allows changes to lower levels without affecting higher levels.
This document provides an overview of database management systems and the normalization process. It begins with definitions of data hierarchy and traditional file processing approaches. It then describes the benefits of a database approach using a DBMS, including features like querying, backup/replication, and security. Components of a DBMS are explained, including data definition languages, data manipulation languages, and the data dictionary. Common data models like hierarchical, network, relational, and object models are also summarized. The document concludes by defining key concepts in normalization like functional dependencies and normal forms, and providing an overview of the normalization process.
Database users can be categorized into actors on the scene and workers behind the scene. Actors on the scene include database administrators, database designers, end users like casual users, naive users, and sophisticated users. Workers behind the scene include DBMS system designers and implementers who design and develop the database management system software and modules.
(1) DBMS provides centralized management of data which reduces redundancy and inconsistencies.
(2) It enforces data integrity through features like controlling access to data, enforcing rules and standards.
(3) DBMS allows for multiple user interfaces and access to data through query tools and programming interfaces.
The document discusses database management systems (DBMS) and their advantages over traditional file-oriented data storage. It describes the key components of a DBMS, including the data definition language (DDL) used to define the database schema, the data manipulation language (DML) used to query and manipulate data, and database models like relational, hierarchical and network models. The document provides examples of how a sample education database could be structured in a relational model using tables, attributes, and relations.
DATABASE MANAGEMENT SYSTEM UNIT-I Chapter-1Raj vardhan
Database systems have become essential in modern society, with applications in libraries, banking, travel, retail, and online purchases. A database contains organized data and a database management system provides tools to define, construct, manipulate, share, and protect the database. The three-schema architecture separates a database into an internal schema for physical storage, a conceptual schema for logical structure, and external schemas for individual user views. This separation and the use of mappings between schemas provides logical and physical data independence.
The document discusses fundamental database concepts including:
1) A database management system (DBMS) is software that maintains large amounts of structured data and allows secure, concurrent access by many users.
2) A DBMS provides capabilities like persistent data storage, concurrency control, redundancy control, and complex data relationships that are difficult to achieve without it.
3) Actors involved with databases include database administrators, designers, developers, and end users, as well as people who develop and maintain the underlying DBMS software.
Database management system by Gursharan singhGursharan Singh
Database Management System (DBMS) organizes data into a database and provides tools to store, access, and analyze the data. It offers several advantages over traditional file-based data storage, including reduced data redundancy, improved data consistency, data sharing across users, and enhanced security. A typical DBMS uses a 3-tier architecture separating the user interface, application logic, and data storage tiers. It also employs standard data models like the entity-relationship and relational models to structure the database content.
This document provides an overview of database management systems and related concepts. It discusses data hierarchy, traditional file processing, the database approach to data management, features and capabilities of database management systems, database schemas, components of database management systems, common data models including hierarchical, network, and relational models, and the process of data normalization.
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.
The document provides an introduction to database management systems (DBMS) presented by Mrs. Surkhab Shelly. It defines a database and DBMS, lists some examples of DBMS software, and discusses the advantages of using a DBMS including reducing data redundancy, sharing data, ensuring data integrity and security, and automating backup and recovery. It also outlines the components of a DBMS including software, hardware, procedures, data, and different types of users.
The document discusses database management systems and data modeling. It begins by defining key terms like data, databases, database management systems, and data models. It then provides a brief history of database development from the 1960s to the 1980s. The rest of the document discusses database concepts in more detail, including components of a DBMS, types of database users, database administration responsibilities, data modeling techniques, and the evolution of different data models.
A database management system (DBMS) is a collection of programs that enables users to create and maintain a database. It stores data in a way that makes it easier to retrieve, manipulate, and generate information. Some key advantages of a DBMS include data independence, efficient data access, data integrity and security, concurrent access and crash recovery. The goal of a DBMS is to provide an environment that is convenient and efficient for retrieving and storing information in the database.
The document discusses the components of a database management system (DBMS). It describes the main components as the DBMS software, hardware, data, procedures, database access language, and users. The software controls and manages the database. The hardware includes storage devices and computers. Data is the most important component, which is stored, updated, and retrieved from databases. Procedures provide instructions for using the DBMS. A database access language like SQL is used to interact with the data. Users include application programmers, database administrators, and end-users.
The document discusses different types of users that interact with a database management system (DBMS). It identifies end users, application programmers, system analysts, database administrators, and sophisticated users. It then describes key characteristics of the database approach including managing information, easy implementation of operations, multiple views of the database, representing real world applications, self-describing nature, logical relationships between records and data, and separation between programs and data.
Database management systems have fundamentally changed how organizations work by providing a centralized repository for storing and accessing crucial information. Early databases used file systems which led to issues like data redundancy, difficulty accessing data, and integrity problems. The database approach emerged as a solution, treating data as a shared resource managed by a database administrator. A database management system provides controlled access to the database for users and application programs.
The document provides an introduction to database systems. It defines key terms like database, database management system (DBMS), and database system. It describes the characteristics of database systems and some advantages over file-based systems, like reduced redundancy and supporting multiple users. It also outlines typical DBMS functionality, components of a database system environment, different types of database users, and the historical development of database technology.
This document provides an overview of database management systems (DBMS). It discusses what a DBMS is, its architecture and components. A DBMS allows for centralized control of data to reduce redundancy and inconsistencies. It also provides data sharing, integrity, security and recovery mechanisms. The document describes the entity-relationship, network, relational and object-oriented data models. It also discusses the three-tier architecture of a DBMS and the concept of data abstraction through the three schema architecture.
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 presentation discusses databases and database management systems. It begins by defining data and information, and explaining how databases store both raw data and metadata to facilitate sharing and management. The presentation then covers the components and functions of a database system, including the database, DBMS software, operating system, and users. It emphasizes the importance of database design and explains how databases improved upon early file systems. In closing, it summarizes that databases integrate data for improved access and consistency, while database management systems perform functions like data storage, security, and backup recovery.
The document provides an overview of database management systems (DBMS). It discusses what a database is, the purpose of a DBMS, different types of database users, and key concepts related to database systems and architecture. Specifically, it covers data models, schemas and instances, the three-schema DBMS architecture which separates the physical, conceptual and external levels, and the importance of data independence which allows changes to lower levels without affecting higher levels.
This document provides an overview of database management systems and the normalization process. It begins with definitions of data hierarchy and traditional file processing approaches. It then describes the benefits of a database approach using a DBMS, including features like querying, backup/replication, and security. Components of a DBMS are explained, including data definition languages, data manipulation languages, and the data dictionary. Common data models like hierarchical, network, relational, and object models are also summarized. The document concludes by defining key concepts in normalization like functional dependencies and normal forms, and providing an overview of the normalization process.
Database users can be categorized into actors on the scene and workers behind the scene. Actors on the scene include database administrators, database designers, end users like casual users, naive users, and sophisticated users. Workers behind the scene include DBMS system designers and implementers who design and develop the database management system software and modules.
(1) DBMS provides centralized management of data which reduces redundancy and inconsistencies.
(2) It enforces data integrity through features like controlling access to data, enforcing rules and standards.
(3) DBMS allows for multiple user interfaces and access to data through query tools and programming interfaces.
The document discusses database management systems (DBMS) and their advantages over traditional file-oriented data storage. It describes the key components of a DBMS, including the data definition language (DDL) used to define the database schema, the data manipulation language (DML) used to query and manipulate data, and database models like relational, hierarchical and network models. The document provides examples of how a sample education database could be structured in a relational model using tables, attributes, and relations.
DATABASE MANAGEMENT SYSTEM UNIT-I Chapter-1Raj vardhan
Database systems have become essential in modern society, with applications in libraries, banking, travel, retail, and online purchases. A database contains organized data and a database management system provides tools to define, construct, manipulate, share, and protect the database. The three-schema architecture separates a database into an internal schema for physical storage, a conceptual schema for logical structure, and external schemas for individual user views. This separation and the use of mappings between schemas provides logical and physical data independence.
The document discusses fundamental database concepts including:
1) A database management system (DBMS) is software that maintains large amounts of structured data and allows secure, concurrent access by many users.
2) A DBMS provides capabilities like persistent data storage, concurrency control, redundancy control, and complex data relationships that are difficult to achieve without it.
3) Actors involved with databases include database administrators, designers, developers, and end users, as well as people who develop and maintain the underlying DBMS software.
Database management system by Gursharan singhGursharan Singh
Database Management System (DBMS) organizes data into a database and provides tools to store, access, and analyze the data. It offers several advantages over traditional file-based data storage, including reduced data redundancy, improved data consistency, data sharing across users, and enhanced security. A typical DBMS uses a 3-tier architecture separating the user interface, application logic, and data storage tiers. It also employs standard data models like the entity-relationship and relational models to structure the database content.
This document provides an overview of database management systems and related concepts. It discusses data hierarchy, traditional file processing, the database approach to data management, features and capabilities of database management systems, database schemas, components of database management systems, common data models including hierarchical, network, and relational models, and the process of data normalization.
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.
The document provides an introduction to database management systems (DBMS) presented by Mrs. Surkhab Shelly. It defines a database and DBMS, lists some examples of DBMS software, and discusses the advantages of using a DBMS including reducing data redundancy, sharing data, ensuring data integrity and security, and automating backup and recovery. It also outlines the components of a DBMS including software, hardware, procedures, data, and different types of users.
The document discusses database management systems and data modeling. It begins by defining key terms like data, databases, database management systems, and data models. It then provides a brief history of database development from the 1960s to the 1980s. The rest of the document discusses database concepts in more detail, including components of a DBMS, types of database users, database administration responsibilities, data modeling techniques, and the evolution of different data models.
A database management system (DBMS) is a collection of programs that enables users to create and maintain a database. It stores data in a way that makes it easier to retrieve, manipulate, and generate information. Some key advantages of a DBMS include data independence, efficient data access, data integrity and security, concurrent access and crash recovery. The goal of a DBMS is to provide an environment that is convenient and efficient for retrieving and storing information in the database.
The document discusses the components of a database management system (DBMS). It describes the main components as the DBMS software, hardware, data, procedures, database access language, and users. The software controls and manages the database. The hardware includes storage devices and computers. Data is the most important component, which is stored, updated, and retrieved from databases. Procedures provide instructions for using the DBMS. A database access language like SQL is used to interact with the data. Users include application programmers, database administrators, and end-users.
The document discusses different types of users that interact with a database management system (DBMS). It identifies end users, application programmers, system analysts, database administrators, and sophisticated users. It then describes key characteristics of the database approach including managing information, easy implementation of operations, multiple views of the database, representing real world applications, self-describing nature, logical relationships between records and data, and separation between programs and data.
Database management systems have fundamentally changed how organizations work by providing a centralized repository for storing and accessing crucial information. Early databases used file systems which led to issues like data redundancy, difficulty accessing data, and integrity problems. The database approach emerged as a solution, treating data as a shared resource managed by a database administrator. A database management system provides controlled access to the database for users and application programs.
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DataMgt - UNIT-I .PPT
1. Bharati Vidyapeeth (Deemed to be University), Pune
Institute of Management, Kolhapur
DBMS
Dr. Bhaskar V. Patil
2. Data and Information
DATA: Data is raw, unorganized facts that need to be processed.
E.g. – Collection of stundent data those are pased 12th examination.
INFORMATION: It is Process on data. Data presented in a form suitable
for interpretation which provides meaning to data.
E.g. – Enterence Exam is process on collected data
DATABASE: A shared collection of interrelated data designed to meet the
varied information needs of an organization.
DATABASE MANAGEMENT SYSTEM [DBMS]: A collection of
programs to create and maintain a database.
Define
Construct
Manipulate
3. Advantages of Database Processing
More information from same data
Shared data
Balancing conflicts among users
Controlled redundancy
Consistency
Integrity
Security
Increased productivity
Data independence
4. Disadvantages of Database Processing
Increased size
Increased complexity
More expensive personnel
Increased impact of failure
Difficulty of recovery
Cost
Especially server and mainframe systems
5. Files and Databases
Metadata
“Data about data”
○ Description of fields
○ Display and format instructions
○ Structure of files and tables
○ Security and access rules
○ Triggers and operational rules
6. File Management Systems
Collection of application programs that perform services for the
end users (e.g. reports).
Each program defines and manages its own data.
Provided facilities to extract data and share files, but did not
implement any way to connect records in one file to those in
another.
Relationships had to be implemented in application code.
7. Limitations of File-Based Approach
Separation and isolation of data
Each program maintains its own set of data.
Users of one program may be unaware of potentially useful
data held by other programs.
Duplication of data
Same data is held by different programs.
Wasted space and potentially different values and/or different
formats for the same item.
9. Typical DBMS Functionality
Define a database: in terms of data types, structures and
constraints
Construct or Load the Database on a secondary storage medium
Manipulating the database: querying, generating reports,
insertions, deletions and modifications to its content
Concurrent Processing and Sharing by a set of users and
programs – yet, keeping all data valid and consistent.
Other features:
Protection or Security measures to prevent unauthorized
access
“Active” processing to take internal actions on data
Presentation and Visualization of data
10. Main Characteristics of the Database Approach
Self-describing nature of a database system: A DBMS catalog
stores the description of the database. The description is called
meta-data). This allows the DBMS software to work with different
databases.
Insulation between programs and data: Called program-data
independence. Allows changing data storage structures and
operations without having to change the DBMS access programs.
Data Abstraction: A data model is used to hide storage details
and present the users with a conceptual view of the database.
11. Main Characteristics of the Database Approach
Sharing of data and multiuser transaction processing :
allowing a set of concurrent users to retrieve and to update the
database. Concurrency control within the DBMS guarantees that
each transaction is correctly executed or completely aborted.
OLTP (Online Transaction Processing) is a major part of
database applications.
Support of multiple views of the data: Each user may see a
different view of the database, which describes only the data of
interest to that user.
12. Advantages of Using the Database Approach
Controlling redundancy in data storage and in development and
maintenance efforts.
Sharing of data among multiple users.
Restricting unauthorized access to data.
Providing persistent storage for program Objects
Providing Storage Structures for efficient Query Processing.
Providing backup and recovery services.
Providing multiple interfaces to different classes of users.
Enforcing integrity constraints on the database.
Drawing Inferences and Actions using rules
13. Disadvantages of DBMSs
Complexity
Size
Cost of DBMS
Additional hardware costs
Cost of conversion
Performance
Higher impact of a failure
14. Architecture of DBMS
Simple User
Or
End User
Application
Developers
Occasional
Users DBA
Application
Programs
Routine Call Consulted Database
Schema
Object code of
Application
Programs
Precomplier of
DML
Query
Processor
Compiler of
DDL
File Manager Database
Manager
Data File Data
Dictionary
Disk Memory
15. Architecture of DBMS
Pre-compiler of DML –
Transforms SQL statements into statements of host language.
Interact with query processor to generate the appropriate host language code.
Select, Delete , Update, Insert Statements
Query Compiler – Transforms queries into a set of low level language which are
forwarded to the database manager component. Statements
DDL Compiler – Convert set of DDL statements into set of tables
Database Manager -
Processed per submitted queries.
Interface with application programs.
Data Dictionary-
It is software module and database containing descriptions and definition concerning the
structure, data elements, interrelationship and other characteristics of organization
DBMS.
16. Architecture of DBMS
Data Manager
The data manager is the central software component of the DBMS. It is
sometimes referred to as the database control system. One of the functions of
the data manager is to convert operations in the user’s queries coming
directly via the query processor or indirectly via an application program from
user’s logical view to a physical file system. The data manager is responsible
for interfacing with the file system. In addition, the tasks of enforcing
constraints to maintain the consistency and integrity of the data, as well as its
security, are also performed by the data manager. Synchronizing the
simultaneous operations performed by concurrent users is under the control
of the data manager. It is also entrusted with the backup and recovery
operations.
File Manager
Responsibility for the structure of the files and managing the file space
rests with the file manager. It is also responsible for locating the block
containing the required record, requesting this block from the disk manager,
and transmitting the required record to the data manager. The file manager
can be implemented using an interface to the existing file subsystem provided
by the operating system of the host computer or it can include a file subsystem
written especially for DBMS.
17. Architecture of DBMS
Disk Manager
The disk manager is part of the operating system of the host computer
and all physical input and output operations are performed by it . The disk
manager transfers the block or page requested by the file manager so that the
latter need not be concerned with the physical characteristics of the underlying
storage media.
Query Processor
The database user retrieves data by formulating a query in the data
manipulation language provided with the database. The query processor is used
to interpret the online user’s query and convert it into an efficient series of
operations in a form capable of being sent to the data manager for execution.
The query processor uses the data dictionary to find the structure of the relevant
portion of the database and uses the information in modifying the query and
preparing an optimal plan to access the database.
18. Database Users
Database administrators:
Responsible for authorizing access to the database, for coordinating
and monitoring its use, acquiring software and hardware resources,
controlling its use and monitoring efficiency of operations.
Database Designers:
Responsible to define the content, the structure, the constraints, and
functions or transactions against the database. They must
communicate with the end-users and understand their needs.
System Analysts
End Users (Next Slide)
19. End Users
○ Casual: access database occasionally by sophisticated query
language when needed. (Manager)
○ Native: they make up a large section of the end-user population.
Learn only a few facilities that they may use repeatedly. (bank clerk)
○ Sophisticated: These include business analysts, scientists,
engineers, others thoroughly familiar with the system capabilities.
○ Stand-alone: maintain personal database by using well designed
GUI (Turbotax users)