information_schema系统表——COLLATIONS

该表包含每个字符集的所有信息 

The 

COLLATIONS

 table
provides information about collations for each character set.

INFORMATION_SCHEMA  Name	SHOW  Name	Remarks
COLLATION_NAME	Collation
CHARACTER_SET_NAME	Charset	MySQL extension
ID	Id	MySQL extension
IS_DEFAULT	Default	MySQL extension
IS_COMPILED	Compiled	MySQL extension
SORTLEN	Sortlen	MySQL extension

COLLATION_NAME

 is the collation name.

CHARACTER_SET_NAME

 is the name of the
character set with which the collation is associated.

ID

 is the collation ID.

IS_DEFAULT

 indicates whether the collation
is the default for its character set.

IS_COMPILED

 indicates whether the character
set is compiled into the server.

SORTLEN

 is related to the amount of memory
required to sort strings expressed in the character set.

查看方式：
1.SELECT
COLLATION_NAME FROM
INFORMATION_SCHEMA.COLLATIONS
[WHERE
COLLATION_NAME LIKE
'wild']
2.SHOW
COLLATION
[LIKE
'wild']