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Career/Database - SQL/SQL Joins.md
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- theory
date: 2026-06-03
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# The SQL JOIN Clause
The JOIN clause is used to combine rows from two or more tables, based on a related column between them.
Here are the different types of JOINs in SQL:
****(INNER) JOIN****: Returns only rows that have matching values in both tables
****LEFT (OUTER) JOIN****: Returns all rows from the left table, and only the matched rows from the right table
****RIGHT (OUTER) JOIN****: Returns all rows from the right table, and only the matched rows from the left table
****FULL (OUTER) JOIN****: Returns all rows when there is a match in either the left or right table
- (INNER) JOIN: Returns only rows that have matching values in both tables
- LEFT (OUTER) JOIN: Returns all rows from the left table, and only the matched rows from the right table
- RIGHT (OUTER) JOIN: Returns all rows from the right table, and only the matched rows from the left table
- FULL (OUTER) JOIN: Returns all rows when there is a match in either the left or right table