information_schema.collation_character_set_applicability.character_set_name

mysql

type: VARCHAR NOT NULL
5.7-8

mariadb

type: NULL
Note:
Name of the associated character set.
© 2022 MariaDB
5.1-10.8
type: VARCHAR NOT NULL
Note:
Name of the associated character set.
© 2022 MariaDB
10.2-10.7

tidb

type: VARCHAR(32) NOT NULL
Note:
The name of the character set which the collation belongs to.
© 2022 PingCAP
4-6.1

postgres

type: SQL_IDENTIFIER NULL
Note:
Name of the character set
© 1996-2022 The PostgreSQL Global Development Group
10-15
type: SQL_IDENTIFIER
Note:
Name of the character set
© 1996-2022 The PostgreSQL Global Development Group
9.1-9.6

cockroachdb

type: unknown
Note:
Name of the character set (always UTF8).
© 2022 CockroachDB
21.1-21.2

mssql