How To Use Subqueries with the IN Operator
Q
How To Use Subqueries with the IN Operator? - MySQL FAQs - SQL SELECT Statements with JOIN and Subqueries
✍: FYIcenter.com
A
A subquery can be used with the IN operator as "expression IN (subquery)". The subquery should return a single column with one or more rows to form a list of values to be used by the IN operation. The following tutorial exercise shows you how to use a subquery with the IN operator. It returns all links with ids in the fyi_rates table.
mysql> SELECT id, url, tag, YEAR(created) As year FROM fyi_links WHERE id IN (SELECT id FROM fyi_rates); +-----+-------------------+------+------+ | id | url | tag | year | +-----+-------------------+------+------+ | 101 | dev.fyicenter.com | DEV | 2006 | | 102 | dba.fyicenter.com | DBA | 2006 | | 103 | sqa.fyicenter.com | SQA | 2006 | +-----+-------------------+------+------+ 3 rows in set (0.06 sec)
2007-05-11, 7437👍, 0💬
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