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Instance and Schema in DBMS in Hindi

Computer Science Engineering Tutorials in Hindi | Relational Database Management System Tutorial for Beginners in Hindi


Instance and Schema in DBMS in Hindi


DBMS Schema
 

Definition of schema: 
किसी Database का Design Schema कहलाता है। Schema तीन प्रकार के होते  है : 
1. Physical schema, 
2. logical schema
3. view schema

For example: 
following diagram में, हमारे पास एक schema है जो दिखाता है 3 Table के बीच Relation:  Course, Student and Section। diagram केवल Database का Design दिखाता है, यह उन में मौजूद Data को नहीं दिखाता है table। Schema Database का केवल एक structural view (design) है जैसा कि इसमें दिखाया गया है

Instance and Schema in DBMS in Hindi
DBMS Instance : 
Definition of instance:  

Database में एक particular moment में stored Data को Database का Example कहा जाता है। Database Schema variable को define करता है 



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