Database Management System
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The document defines key terms related to database management systems (DBMS). It states that a DBMS is a collection of programs that allows users to store, retrieve, modify, and update data stored in a database. A DBMS also allows users to create or drop databases. Popular DBMS platforms include Oracle, Sybase, MySQL, and Microsoft SQL Server. The document also defines data, information, databases, database administrators, schemas, primary keys, and foreign keys as important concepts relating to DBMS.
Database Management System
- 1. By Maria Stella Solon
- 2. WHAT IS DBMS? Before answering this question. Let’s learn the key Terminologies of DBMS.
- 3. DATA Data is a Latin word meaning which is plural in format and has “Datum” as its singular format, layman may describe data as “Raw facts and Figures” 0-9 A-Z Special Characters etc.
- 4. INFORMATION On processing raw facts and figures(DATA ) the outcome is in the form of meaningful information. Information is the key to “Decision Making”
- 5. EXPLANATION
- 7. DATABASE Database is defined as the systematic and organized information of data, for effective and efficient retrieval and modification of data as and when required. DATABASE CENTRALIZED DISTRIBUTED
- 8. DATABASE ADMINISTRATOR Database Administrator is an expert or team of experts who works as a manager of the Database and is responsible for: Security Data Backup Data Recovery Troubleshooting, etc.
- 9. EXPLANATION
- 10. DBMS Database Management System is collection of program schedules, that allows one to store, fetch(retrieve), modify or update data stored in Database. One can create or drop database using DBMS.Cthe popular forms are: Oracle, Sybase, MySQL, Microsoft SQL Server
- 11. SCHEMA Schema defines the structures of Database, it is describe as the blueprint of the database. We have three levels of schema hat are classified on the basis of different level of views available: SCHEMA INTERNAL SCHEMA CONCEPTUAL SCHEMA EXTERNAL SCHEMA
- 12. PRIMARY KEY Primary Key – is used to recognized a record uniquely. A primary key must be: Unique – Value in primary column cannot be repeated. Not Null – The Primary Key cannot have a null value i.e. The primary key cannot be left blank.
- 13. FOREIGN KEY Foreign Key - is the key is used to link two functions in table(Table) in a database. In simple if we assume two tables Table A and Table B, the primary key of Table A will act as the foreign key in Table B.
- 14. THANK YOU !