గ్రామ వార్డు సచివాలయ ఉద్యోగాలు
Database Management Systems
Lesson-1 Introduction
Lesson-2 Data Models and DBMS Architecture
Lesson-3 Abstraction, Schema, Constraints
Lesson-4 Database Design::E-R Model
Lesson-5 DDL&DML Commands
Model Test-1
Model Test-2 with timer
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