Join is the most important concept in SQL. Join is used for getting data from two or more tables however it is observed that people do not understand the right concept of the join and they end up using the wrong join method which might result in the wrong dataset.
Use of Join:
A SQL Join statement is used to combine data from two or more tables based on a common field between them. When we have a large web application and data are huge in multiple tables then we need to combine the data of two or more tables. In such a case, we need to use join queries.
- Left Join
- Right Join
- Full Outer Join
- Inner Join
- Cross Join
- Self Join
