COLLATION_CHARACTER_SET_APPLICABILITY

The COLLATION_CHARACTER_SET_APPLICABILITY table maps collations to the applicable character set name. Similar to the COLLATIONS table, it is included only for compatibility with MySQL.

USE INFORMATION_SCHEMA; DESC COLLATION_CHARACTER_SET_APPLICABILITY;

The output is as follows:

+--------------------+-------------+------+------+---------+-------+ | Field | Type | Null | Key | Default | Extra | +--------------------+-------------+------+------+---------+-------+ | COLLATION_NAME | varchar(32) | NO | | NULL | | | CHARACTER_SET_NAME | varchar(32) | NO | | NULL | | +--------------------+-------------+------+------+---------+-------+ 2 rows in set (0.00 sec)

View the collation mapping for the utf8mb4 character set in the COLLATION_CHARACTER_SET_APPLICABILITY table:

SELECT * FROM COLLATION_CHARACTER_SET_APPLICABILITY WHERE character_set_name='utf8mb4';

The output is as follows:

+--------------------+--------------------+ | COLLATION_NAME | CHARACTER_SET_NAME | +--------------------+--------------------+ | utf8mb4_bin | utf8mb4 | | utf8mb4_general_ci | utf8mb4 | | utf8mb4_unicode_ci | utf8mb4 | +--------------------+--------------------+ 3 rows in set (0.00 sec)

The description of columns in the COLLATION_CHARACTER_SET_APPLICABILITY table is as follows:

  • COLLATION_NAME: The name of the collation.
  • CHARACTER_SET_NAME: The name of the character set which the collation belongs to.

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