`information_schema.collations.is_default`

mysql

type: VARCHAR NOT NULL

5.7-8

type: NULL

Note:

Whether the collation is the character set's default.

5.1-10.8

type: VARCHAR NOT NULL

Note:

Whether the collation is the character set's default.

type: VARCHAR(3) NULL

Note:

Whether this collation is the default collation of the character set it belongs to.

4-6.1