This document discusses database abstraction and users. It describes the three levels of abstraction in a database system according to the ANSI/SPARC standard: the external, conceptual, and internal levels. The external level includes user views, the conceptual level includes the overall database schema, and the internal level describes the physical storage structures. Mapping defines the correspondence between levels, and data independence means changes to lower levels do not affect higher levels. The document also lists different types of database users, including naive users, application programmers, sophisticated users, and the database administrator.
Dbms architecture
Three level architecture is also called ANSI/SPARC architecture or three schema architecture
This framework is used for describing the structure of specific database systems (small systems may not support all aspects of the architecture)
In this architecture the database schemas can be defined at three levels explained in next slide
DBMS Vs TRADITIONAL FILES COMPARISON, DBMS ADVANTAGES AND DISADVANTAGES, CLASSIC FILE BASED SYSTEM, ADVANTAGES AND DISADVANTAGES OF CLASSICAL TECHNIQUE
An Introduction to Architecture of Object Oriented Database Management System and how it differs from RDBMS means Relational Database Management System
Dbms architecture
Three level architecture is also called ANSI/SPARC architecture or three schema architecture
This framework is used for describing the structure of specific database systems (small systems may not support all aspects of the architecture)
In this architecture the database schemas can be defined at three levels explained in next slide
DBMS Vs TRADITIONAL FILES COMPARISON, DBMS ADVANTAGES AND DISADVANTAGES, CLASSIC FILE BASED SYSTEM, ADVANTAGES AND DISADVANTAGES OF CLASSICAL TECHNIQUE
An Introduction to Architecture of Object Oriented Database Management System and how it differs from RDBMS means Relational Database Management System
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.
-This lecture about the Details explanation about the Database Development life Cycle. This lecture show about the Software development Cycle in term of DB. This lecture Explain the architecture of the Database. This lecture explain about the Three-Level ANSI-SPARC Architecture.
Data & Information, Drawbacks of File system, What is Database Management Systems, What is the need of DBMS, Examples of DBMS, Database Types, Applications of DBMS, Advantage of DBMS over file system, Disadvantages of DBMS, DBMS vs. File System
About
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Technical Specifications
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
Key Features
Indigenized remote control interface card suitable for MAFI system CCR equipment. Compatible for IDM8000 CCR. Backplane mounted serial and TCP/Ethernet communication module for CCR remote access. IDM 8000 CCR remote control on serial and TCP protocol.
• Remote control: Parallel or serial interface
• Compatible with MAFI CCR system
• Copatiable with IDM8000 CCR
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
Application
• Remote control: Parallel or serial interface.
• Compatible with MAFI CCR system.
• Compatible with IDM8000 CCR.
• Compatible with Backplane mount serial communication.
• Compatible with commercial and Defence aviation CCR system.
• Remote control system for accessing CCR and allied system over serial or TCP.
• Indigenized local Support/presence in India.
• Easy in configuration using DIP switches.
Cosmetic shop management system project report.pdfKamal Acharya
Buying new cosmetic products is difficult. It can even be scary for those who have sensitive skin and are prone to skin trouble. The information needed to alleviate this problem is on the back of each product, but it's thought to interpret those ingredient lists unless you have a background in chemistry.
Instead of buying and hoping for the best, we can use data science to help us predict which products may be good fits for us. It includes various function programs to do the above mentioned tasks.
Data file handling has been effectively used in the program.
The automated cosmetic shop management system should deal with the automation of general workflow and administration process of the shop. The main processes of the system focus on customer's request where the system is able to search the most appropriate products and deliver it to the customers. It should help the employees to quickly identify the list of cosmetic product that have reached the minimum quantity and also keep a track of expired date for each cosmetic product. It should help the employees to find the rack number in which the product is placed.It is also Faster and more efficient way.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
Saudi Arabia stands as a titan in the global energy landscape, renowned for its abundant oil and gas resources. It's the largest exporter of petroleum and holds some of the world's most significant reserves. Let's delve into the top 10 oil and gas projects shaping Saudi Arabia's energy future in 2024.
Hierarchical Digital Twin of a Naval Power SystemKerry Sado
A hierarchical digital twin of a Naval DC power system has been developed and experimentally verified. Similar to other state-of-the-art digital twins, this technology creates a digital replica of the physical system executed in real-time or faster, which can modify hardware controls. However, its advantage stems from distributing computational efforts by utilizing a hierarchical structure composed of lower-level digital twin blocks and a higher-level system digital twin. Each digital twin block is associated with a physical subsystem of the hardware and communicates with a singular system digital twin, which creates a system-level response. By extracting information from each level of the hierarchy, power system controls of the hardware were reconfigured autonomously. This hierarchical digital twin development offers several advantages over other digital twins, particularly in the field of naval power systems. The hierarchical structure allows for greater computational efficiency and scalability while the ability to autonomously reconfigure hardware controls offers increased flexibility and responsiveness. The hierarchical decomposition and models utilized were well aligned with the physical twin, as indicated by the maximum deviations between the developed digital twin hierarchy and the hardware.
1. Dr. Amiya Ranjan Panda
Assistant Professor [II]
School of Computer Engineering,
Kalinga Institute of Industrial Technology (KIIT),
Deemed to be University,Odisha
Database Management Systems (CS 2004)
KALINGA INSTITUTE OF INDUSTRIAL
TECHNOLOGY
School Of Computer
Engineering
4 Credit Lecture Note 03
3. q The goal of the ANSI/SPARC 3-level abstraction is to separate the user
applications and the physical database. It deals with the data, the relationship
between them and the different access methods implemented on the database.
The logical design of a database is called a schema.
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3-Level Abstraction of Database
4. ü External/View Level: The external level includes a number of external
schemas or user views. Each external schema or user view describes the
part of the database that a particular user group is interested in and hides the
details of the database from that user group.
ü Conceptual Level: 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 and constraints.
It represents global view of the entire database. Thus; for a database, there
is only one conceptual schema available.
ü Internal Level: The internal level has an internal schema, which describes
the physical storage structure of the database system. Like conceptual
schema, there is only one internal schema available for a database. It is the
one which is closest to physical storage. The internal schema not only
defines the various stored record types, but also specifies what indices exist,
how stored fields are represented.
4
3-Level Abstraction of Database...
5. q In a database system based on the 3-level architecture, each user group
refers only to its own external schema. The process of transforming
requests and results between different levels are called mapping.
ü Conceptual/Internal Mapping: It defines the correspondence between the
conceptual view and the stored database. Physical Data Independence
indicates that the internal schema can be changed without any change to the
conceptual schema.
ü External/Conceptual Mapping: It defines the correspondence between a
particular external view and the conceptual view. Logical Data
Independence indicates that the conceptual schema can be changed
without affecting the existing external schemas.
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Mapping and Data Independence
6. ü Naive Users: They are the normal or unsophisticated users who interact
with the system by invoking application programs that have been written
previously. The typical user interface for naive users is a form interface,
where the user can fill in appropriate fields of the form.
ü Application Programmers: They are computer professionals who write
application programs to access data from the database. Application
programmers can use different tools to develop user interfaces.
ü Sophisticated Users: They interact with the system without creating any
application program. Rather, they form their requests in a database query
language and submit each such query to a query processor. Analysts who
submit queries to explore data in the database fall in this category.
ü Specialized Users: They are sophisticated users who write specialized
database applications that don’t fit into the traditional data processing
framework.
ü Database Administrator (DBA): The person who has central control of
the whole database system is called DBA. The DBA coordinates all the
activities of the database system.
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Database Users
q Different database users are:
7. 7
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Role of Data Base Administrator
ü DBA creates the original database schema by executing a set of DDL
statements.
ü DBA defines and controls the access methods for the different users.
ü DBA carries out changes to the schema and physical organization to reflect
the changing needs of the organization, or to alter the physical organization
to improve performance.
ü By granting different types of authorization, DBA can regulate which parts
of the database various users can access.
ü DBA specifies the different types of constraints to different tables or objects.
ü DBA is responsible for the periodically backing up the database.
ü DBA ensures that enough free disk space is available for normal operations
and upgrading disk space as required.
ü DBA monitors the jobs running on the database and ensures that the
performance is not degraded by very expensive tasks submitted by some
users.
q Role of DBA are: