Data Base Management System
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The document introduces databases and database management systems (DBMS). It discusses that a DBMS is software that allows users to create, access, and manage data and databases. A DBMS is made up of four main components: users, a database, database applications, and the DBMS itself. The DBMS controls access to the database and enforces rules like security and data integrity. It also discusses some advantages of using a DBMS like improved data sharing and consistency.
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- 3. Intro to DBMS Data is a vital part of any organization. It needs to be stored, organized, managed, accessed, protected and manipulated. Operational Use databases to: Create a book Track book sales Set salaries and wages Pay employees
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- 10. A user of a database system will Use a database application to track things Use forms to enter, read, delete and query data Produce reports Database Systems - Users Intro to DBMS
- 11. A set of one or more computer programs that serves as an intermediary between the users and the DBMS Application program that read or modify database data by sending SQL statements to DBMS. Application program to present data to users in the format of forms and reports. Intro to DBMS Database Systems – Database Application
- 12. Create and process forms Process user queries Create and process reports Execute application logic Control database applications Database Systems – Database Application : Functions Intro to DBMS
- 13. Intro to DBMS Database Systems – DBMS A computer program used to create, process and administer the database DBMS receives request encoded in SQL and translates these requests into actions on the database DBMS is a large, complicated program that is licensed software. Almost majority of the companies never write their own DBMS program.
- 14. Intro to DBMS Database Systems – Database The database is a collection of related tables and other structures. A database is a self-describing collection of related records
- 15. Create databases Create tables Create supporting structures Read database data Modify database data (insert, update, delete) Maintain database structures Enforce rules Control concurrency Provide security Perform backup and recovery Intro to DBMS Functions of DBMS
- 16. Intro to DBMS Organizational DBMS
- 17. Organizational database systems typically: Support several users simultaneously Include more than one application Involve multiple computers Are complex in design Have many tables Have many databases Intro to DBMS Organizational DBMS