19 lines
625 B
Markdown
Executable File
19 lines
625 B
Markdown
Executable File
---
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note type:
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- database
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- theory
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date: 2026-06-03
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done:
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---
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# The SQL JOIN Clause
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The JOIN clause is used to combine rows from two or more tables, based on a related column between them.
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Here are the different types of JOINs in SQL:
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- (INNER) JOIN: Returns only rows that have matching values in both tables
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- LEFT (OUTER) JOIN: Returns all rows from the left table, and only the matched rows from the right table
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- RIGHT (OUTER) JOIN: Returns all rows from the right table, and only the matched rows from the left table
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- FULL (OUTER) JOIN: Returns all rows when there is a match in either the left or right table
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