Sunday, August 28, 2011

SQL - Join

JOIN: Return rows when there is at least one match in both tables

LEFT JOIN: Return all rows from the left table, even if there are no matches in the right table

RIGHT JOIN: Return all rows from the right table, even if there are no matches in the left table

FULL JOIN: Return rows when there is a match in one of the tables

The INNER JOIN keyword return rows when there is at least one match in both tables.

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