Data Base Management
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A database management system (DBMS) is a set of computer programs that controls the organization, storage, management and retrieval of data in a database. It consists of several components including a DBMS engine that converts logical requests into physical operations, data definition and manipulation subsystems that help users add, change and delete data, and an application generation subsystem that helps develop data-intensive applications. Common DBMS models include hierarchical, network, relational, multidimensional and object-oriented models. Key DBMS capabilities include querying, backup and replication, rule enforcement, security, computation, logging and optimization.
Data Base Management
- 2. DEFINITION
- 4. MODEL
- 6. INTRODUCTIONA database is a collection of information categorized by specific fields. Databases are usually searchable by keywords.A collection of related electronic records in a standardized format, searchable in a variety of ways, such as title, author, subject, and keyword.10/6/20092PREPARED BY RAM
- 7. DEFINITIONA DBMS is a set of software programs that controls the organization, storage, management, and retrieval of data in a databaseA set of programs designed to organize, store, and retrieve machine-readable information from a computer-maintained database or data bankA Database Management System (DBMS) is a set of computer programs that controls the creation, maintenance, and the use of the database of an organization and its end users10/6/20093PREPARED BY RAM
- 8. COMPONENTS OF DBMSDBMS Engine:accepts logical request from the various other DBMS subsystems, converts them into physical equivalentData Definition Subsystem: helps user to create and maintain the data dictionaryData Manipulation Subsystem: helps user to add, change, and delete informationApplication Generation Subsystem: help users to develop transactions-intensive applicationsData Administration Subsystem: helps users to manage the overall database environment10/6/20094PREPARED BY RAM
- 9. DBMS MODELhierarchical model network modelrelational modelMULTIDIMENSIONAL MODELobject ORIENTED model10/6/20095PREPARED BY RAM
- 10. DBMS CAPABILITY Query ability Backup and replication Rule enforcement SecurityComputation Change and access logging Automated optimization 10/6/20096PREPARED BY RAM