Nisha Mittal is teaching live on Unacademy Plus
DBMS Utmost Important for NTA NET Computer Science KVS PGT Computer Science HTET Computer Science
Important Topics Short Definitions DBMS Architecture . Three Levels of architecture . Multiple choice Question
Collection of unorganized numbers , characters , text etc. Collection of meaningful facts in a formalized manner For Example: Phone numbers, Addresses, prices etc. DATA Processed data which help us in making Decisions. Information Information Organized and evaluated in Human's Mind. Knowledge
Database Management System Well organized collection of data so as to be able to carry out operations.
Type of data independence in which schema can be altered on conceptual level without altering external level is classified as I. conceptual level independence 2. external level independence 3. logical data independence 4. physical data independence
Type of data independence in which internal schema can be modified without modifying conceptual schema is classified as I. logical data independence 2. physical data independence 3. conceptual level independence 4. external level independence