Databases And Database Management System
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This document defines and describes different types of databases and database management systems (DBMS). It discusses centralized and distributed databases. A DBMS provides access to organized data, minimizes redundancy and inconsistencies, and allows data sharing. Key functions of a DBMS include data filtering, quality control, synchronization, and maintenance. DBMS offer advantages like permanence, querying, concurrency controls, backups, security, and computation. A DBMS also provides both a physical and logical view of stored data.
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Databases And Database Management System
- 2. Defination A database is a collection of information that is organized so that it can easily be accessed, managed, and updated. A Program that provides access to databases is known as a database management system(DBMS). For the use of DBMS data redundancy, data isolation and data inconsistency are minimized and data can be shared among users of data.
- 3. Types Of Databases: There are basic two types of databases:- Centralized Databases Distributed Databases
- 4. Centralized Databases where the database is physically in one location and users typically use an Internet connection to access it. Banks tend to use centralized databases.
- 5. Distributed Databases Where the database is in many locations often where you have a national or international company and customers tend to regularly interact with a local branch. For example: Google uses Big-Table a distributed DBMS as searching tends to be by users in a particular region of the world.
- 6. Information About DBMS The DBMS permits an organization to centralize data, manage them efficiently and provide access to the stored data by application program. The DBMS acts as an interface between application programs and physical data files. And also it provides user with tools to add, delete, maintain, display, print, search, select, short and update data.
- 7. Function Perform by DBMS Data Filtering and profiling Data quality Data Synchronization Data Enrichment Data maintenance
- 8. Advantages and capabilities of a DBMS Permanence Querying Concurrency Back up and replication Rule Enforcement Security Computation Change and access logging Automated optimization
- 9. View of the Data provide by DBMS A DBMS provides two views of data: A Physical View and A logical View The physical view deals with the actual, physical arrangement and location of data in the direct access storage devices(DASDs). The logical view/user’s view, of a database program represents data in a format that is meaningful to a user and to the software programs that process those data.
- 10. Thank You