Question 245 – Database-Management-System

→ The join operation can be defined as a cartesian product of two relations followed by a selection.

→ A SQL JOIN clause is used to combine rows from two or more tables, based on a related column between them.

Different Types of SQL JOINs

1. INNER JOIN: Returns records that have matching values in both tables

2. LEFT (OUTER) JOIN: Return all records from the left table, and the matched records from the right table

3. RIGHT (OUTER) JOIN: Return all records from the right table, and the matched records from the left table

4. FULL (OUTER) JOIN: Return all records when there is a match in either left or right table