archiving

20260602101857-sql_joins.org

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+:PROPERTIES:
+:ID:       de3bef27-81c9-49d1-85bb-edceb9a80e65
+:END:
+#+title: SQL Joins
+#+filetags: :sql:joins:database:
+
+
+* 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
+