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Basics of DBMS
By Dr. Parteek Bhatia Assistant Professor Department of Computer Science & Engineering Thapar University Patiala
DBMS
Database Management System
Term Database requires understanding of data and information
Simplifieed Approach to DBMS By Parteek Bhatia
Difference between Data and Information?
Simplified Approach to DBMS By Parteek Bhatia
Database
The related information when placed is an organized form makes a database. The organization of data/information is necessary because unorganized information has no meaning.
Simplifieed Approach to DBMS By Parteek Bhatia
Operations on Databases
To add new information
To view or retrieve the stored information
To modify or edit the existing
To remove or delete the unwanted information
Arranging the information in a desired order etc. Simplifieed Approach to DBMS By Parteek Bhatia
Manual database and its problems •Wastage of skills and intelligence of human beings on repetitive calculations. •Error prone.
Simplifieed Approach to DBMS By Parteek Bhatia
Database and Computers •Large storage capacity •It has high speed •Computer is more accurate.
•There are two approaches for storing data in computers such as File based approach and Database approach.
Simplifieed Approach to DBMS By Parteek Bhatia
File Based Approach A file system is a method for storing and organizing computer files and the data they contain to make it easy to find and access them. File systems may use a storage device such as a hard disk or CD-ROM and involve maintaining the physical location of the files. Programmers used programming languages such as COBOL, C++ to write applications that directly accessed flat files to perform data management services and provide information for s. Simplifieed Approach to DBMS By Parteek Bhatia
Limitations of the File-Based Approach
Separated and Isolated Data Duplication of data Data Dependence Difficulty in representing data from the ’s view Data Inflexibility Incompatible file formats
Simplifieed Approach to DBMS By Parteek Bhatia
Database Approach
A database is a computer based record keeping system whose over all purpose is to record and maintain information. The database is a single, large repository of data, which can be used simultaneously by many departments and s.
Simplifieed Approach to DBMS By Parteek Bhatia
Database Management System (DBMS)
DBMS A database management system is the software system that allows s to define, create and maintain a database and provides controlled access to the data. A database management system (DBMS) is basically a collection of programs that enables s to store, modify, and extract information from a database as per the requirements.
Simplifieed Approach to DBMS By Parteek Bhatia
Examples of Database Applications The following are main examples of database applications: Computerized library systems Automated teller machines Flight reservation systems Computerized parts inventory systems Commercially available Database management systems in the market are dbase, Foxpro, IMS and Oracle.
Simplifieed Approach to DBMS By Parteek Bhatia
University Database in File Based System
Simplifieed Approach to DBMS By Parteek Bhatia
University Database in Database based System
Simplifieed Approach to DBMS By Parteek Bhatia
Advantages of DBMS Controlling Redundancy
Simplifieed Approach to DBMS By Parteek Bhatia
Integrity can be enforced
Integrity of data means that data in database is always accurate, such that incorrect information cannot be stored in database.
Simplifieed Approach to DBMS By Parteek Bhatia
Inconsistency can be avoided
When the same data is duplicated and changes are made at one site, which is not propagated to the other site, it gives rise to inconsistency and the two entries regarding the same data will not agree.
Simplifieed Approach to DBMS By Parteek Bhatia
Other Advantages
Data can be shared Providing Backup and Recovery Standards can be enforced Restricting unauthorized access Solving enterprise requirement than individual requirement
Simplifieed Approach to DBMS By Parteek Bhatia
Disadvantages of DBMS
Complexity Size Performance Higher impact of a failure Cost of DBMS Additional Hardware costs Cost of Conversion Simplifieed Approach to DBMS By Parteek Bhatia
Components of the DBMS Environment •Hardware •Software •Data •s •Procedures
Simplifieed Approach to DBMS By Parteek Bhatia
References
Simplified Approach to DBMS Kalyani Publishers By Parteek Bhatia
By Dr. Parteek Bhatia Assistant Professor Department of Computer Science & Engineering Thapar University Patiala
DBMS
Database Management System
Term Database requires understanding of data and information
Simplifieed Approach to DBMS By Parteek Bhatia
Difference between Data and Information?
Simplified Approach to DBMS By Parteek Bhatia
Database
The related information when placed is an organized form makes a database. The organization of data/information is necessary because unorganized information has no meaning.
Simplifieed Approach to DBMS By Parteek Bhatia
Operations on Databases
To add new information
To view or retrieve the stored information
To modify or edit the existing
To remove or delete the unwanted information
Arranging the information in a desired order etc. Simplifieed Approach to DBMS By Parteek Bhatia
Manual database and its problems •Wastage of skills and intelligence of human beings on repetitive calculations. •Error prone.
Simplifieed Approach to DBMS By Parteek Bhatia
Database and Computers •Large storage capacity •It has high speed •Computer is more accurate.
•There are two approaches for storing data in computers such as File based approach and Database approach.
Simplifieed Approach to DBMS By Parteek Bhatia
File Based Approach A file system is a method for storing and organizing computer files and the data they contain to make it easy to find and access them. File systems may use a storage device such as a hard disk or CD-ROM and involve maintaining the physical location of the files. Programmers used programming languages such as COBOL, C++ to write applications that directly accessed flat files to perform data management services and provide information for s. Simplifieed Approach to DBMS By Parteek Bhatia
Limitations of the File-Based Approach
Separated and Isolated Data Duplication of data Data Dependence Difficulty in representing data from the ’s view Data Inflexibility Incompatible file formats
Simplifieed Approach to DBMS By Parteek Bhatia
Database Approach
A database is a computer based record keeping system whose over all purpose is to record and maintain information. The database is a single, large repository of data, which can be used simultaneously by many departments and s.
Simplifieed Approach to DBMS By Parteek Bhatia
Database Management System (DBMS)
DBMS A database management system is the software system that allows s to define, create and maintain a database and provides controlled access to the data. A database management system (DBMS) is basically a collection of programs that enables s to store, modify, and extract information from a database as per the requirements.
Simplifieed Approach to DBMS By Parteek Bhatia
Examples of Database Applications The following are main examples of database applications: Computerized library systems Automated teller machines Flight reservation systems Computerized parts inventory systems Commercially available Database management systems in the market are dbase, Foxpro, IMS and Oracle.
Simplifieed Approach to DBMS By Parteek Bhatia
University Database in File Based System
Simplifieed Approach to DBMS By Parteek Bhatia
University Database in Database based System
Simplifieed Approach to DBMS By Parteek Bhatia
Advantages of DBMS Controlling Redundancy
Simplifieed Approach to DBMS By Parteek Bhatia
Integrity can be enforced
Integrity of data means that data in database is always accurate, such that incorrect information cannot be stored in database.
Simplifieed Approach to DBMS By Parteek Bhatia
Inconsistency can be avoided
When the same data is duplicated and changes are made at one site, which is not propagated to the other site, it gives rise to inconsistency and the two entries regarding the same data will not agree.
Simplifieed Approach to DBMS By Parteek Bhatia
Other Advantages
Data can be shared Providing Backup and Recovery Standards can be enforced Restricting unauthorized access Solving enterprise requirement than individual requirement
Simplifieed Approach to DBMS By Parteek Bhatia
Disadvantages of DBMS
Complexity Size Performance Higher impact of a failure Cost of DBMS Additional Hardware costs Cost of Conversion Simplifieed Approach to DBMS By Parteek Bhatia
Components of the DBMS Environment •Hardware •Software •Data •s •Procedures
Simplifieed Approach to DBMS By Parteek Bhatia
References
Simplified Approach to DBMS Kalyani Publishers By Parteek Bhatia
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