It takes an optional LIKE clause that indicates which collation names to match.
mysql>mysql>mysql> SHOW COLLATION LIKE 'latin1%';+-------------------+---------+----+---------+----------+---------+| Collation | Charset | Id | Default | Compiled | Sortlen |+-------------------+---------+----+---------+----------+---------+| latin1_german1_ci | latin1 | 5 | | Yes | 1 || latin1_swedish_ci | latin1 | 8 | Yes | Yes | 1 || latin1_danish_ci | latin1 | 15 | | Yes | 1 || latin1_german2_ci | latin1 | 31 | | Yes | 2 || latin1_bin | latin1 | 47 | | Yes | 1 || latin1_general_ci | latin1 | 48 | | Yes | 1 || latin1_general_cs | latin1 | 49 | | Yes | 1 || latin1_spanish_ci | latin1 | 94 | | Yes | 1 |+-------------------+---------+----+---------+----------+---------+8 rows in set (0.00 sec)
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