SHOW COLLATION
[LIKE 'pattern' | WHERE expr]
This statement lists collations supported by the server. By
default, the output from SHOW
COLLATION
includes all available collations. The
LIKE
clause, if present, indicates
which collation names to match. The WHERE
clause can be given to select rows using more general
conditions, as discussed in Section 28.8, “Extensions to SHOW Statements”. For
example:
mysql> SHOW COLLATION WHERE Charset = '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 |
+-------------------+---------+----+---------+----------+---------+
SHOW COLLATION
output has these
columns:
Collation
The collation name.
Charset
The name of the character set with which the collation is associated.
Id
The collation ID.
Default
Whether the collation is the default for its character set.
Compiled
Whether the character set is compiled into the server.
Sortlen
This is related to the amount of memory required to sort strings expressed in the character set.
Pad_attribute
The collation pad attribute, one of
NO PAD
orPAD SPACE
. This attribute affects whether trailing spaces are significant in string comparisons; for more information, see Trailing Space Handling in Comparisons.
To see the default collation for each character set, use the
following statement. Default
is a reserved
word, so to use it as an identifier, it must be quoted as such:
mysql> SHOW COLLATION WHERE `Default` = 'Yes';
+---------------------+----------+----+---------+----------+---------+
| Collation | Charset | Id | Default | Compiled | Sortlen |
+---------------------+----------+----+---------+----------+---------+
| big5_chinese_ci | big5 | 1 | Yes | Yes | 1 |
| dec8_swedish_ci | dec8 | 3 | Yes | Yes | 1 |
| cp850_general_ci | cp850 | 4 | Yes | Yes | 1 |
| hp8_english_ci | hp8 | 6 | Yes | Yes | 1 |
| koi8r_general_ci | koi8r | 7 | Yes | Yes | 1 |
| latin1_swedish_ci | latin1 | 8 | Yes | Yes | 1 |
...
Collation information is also available from the
INFORMATION_SCHEMA
COLLATIONS
table. See
Section 28.3.6, “The INFORMATION_SCHEMA COLLATIONS Table”.