Can Group Functions Be Used in the ORDER BY Clause

Q

Can Group Functions Be Used in the ORDER BY Clause? - MySQL FAQs - SQL SELECT Query Statements with GROUP BY

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A

If the query output is aggregated as groups, you can sort the groups by using group functions in the ORDER BY clause. The following statement returns how many links were created in each year in each tag. The group output is sorted by the count in each group in descending order:

mysql> SELECT tag, YEAR(created), COUNT(*) 
   FROM fyi_links GROUP BY tag, YEAR(created) 
   ORDER BY COUNT(*) DESC;
+------+---------------+----------+
| tag  | YEAR(created) | COUNT(*) |
+------+---------------+----------+
| DBA  |          2006 |        2 |
| DEV  |          2006 |        1 |
| SQA  |          2006 |        1 |
| DBA  |          2005 |        1 |
| DEV  |          2004 |        1 |
| SQA  |          2003 |        1 |
+------+---------------+----------+
6 rows in set (0.00 sec)

2007-05-11, 5460👍, 0💬

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