This PPT is database management system schema and instance.

1. DBMS Schema and Instance

2. DBMS Schema and Instance
DBMS Schema
:-
The overall description of the database
is called DBMS Schema.
OR
The Logical representation of database is
called DBMS Schema.
RDBM
S
Roll Name Age
11 Papan 18 SQL
Example
:

3. DBMS Schema and Instance
DBMS Sub-
Schema :-
Sub-schema is used to create very
different and personalized view of the
Same data.
DBMS
Schema
Sub-Schema Sub-Schema
User-1 User-2 User-3
Roll Name Age
11 Papan 18
Name
Papan
Example
:

4. DBMS Schema and Instance
DBMS
Instance :-
The data stored in a database at a
particular moment is called Instance of
the database.
Date :
1/1/2019
Student Table
:
Records = 50
Date :
1/2/2019
Student Table
:
Records =
300