Rdbms

UNIT 3 : DATABASES & SQL Developed by : Ms. Nita Arora Kulachi Hansraj Model School Ashok Vihar

[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Advantages of the DBMS Approach ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

What is a database? ,[object Object],[object Object],[object Object],[object Object]

Some of the Advantages of using a DBMS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Some of the Disadvantages of using a DBMS ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

DBMS Architecture ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Three Level Architecture ,[object Object],External Level View 1 View 4 View 2 View 3 etc. Conceptual Level Conceptual Schema Internal Schema Internal Level Physical Data Independence Logical Data Independence

DIFFERENT DATA MODELS ,[object Object],[object Object],[object Object],[object Object]

RELATIONAL DATA MODELS : Terminology ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

RELATIONAL DATA MODELS : Terminology (Contd….) ,[object Object],[object Object],[object Object],[object Object]

Relational Algebra ,[object Object],[object Object]

Relational Algebra ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

Join ,[object Object],(Natural or Inner) Join A1 B1 A2 B1 A3 B2 B1 C1 B2 C2 B3 C3 A1 B1 C1 A2 B1 C1 A3 B2 C2

Outer Join ,[object Object],A1 B1 A2 B1 A3 B2 A4 B7 B1 C1 B2 C2 B3 C3 A1 B1 C1 A2 B1 C1 A3 B2 C2 A4 * * Outer Join

Rdbms

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Rdbms