information_schema.tables.table_schema

mysql

type: VARCHAR NOT NULL
5.7-8

mariadb

type: NULL
Note:
Database name.
© 2022 MariaDB
5.1-10.8
type: VARCHAR NOT NULL
Note:
Database name.
© 2022 MariaDB
10.2-10.7

tidb

type: VARCHAR(64) NULL
Note:
The name of the schema which the table belongs to.
© 2022 PingCAP
4-6.1

postgres

type: SQL_IDENTIFIER NULL
Note:
Name of the schema that contains the table
© 1996-2022 The PostgreSQL Global Development Group
10-15
type: SQL_IDENTIFIER
Note:
Name of the schema that contains the table
© 1996-2022 The PostgreSQL Global Development Group
7.4-9.6

cockroachdb

type: unknown
Note:
Name of the schema that contains the table.
© 2022 CockroachDB
2-21.2
Note:
Name of the database that contains the table.
© 2022 CockroachDB
1-1.1

mssql

type: NVARCHAR(128) NULL
Note:
Name of schema that contains the table. ** Important ** only reliable way to find the schema of an object is to query the sys.objects catalog view. INFORMATION_SCHEMA views could be incomplete since they are not updated for all new features.
© Microsoft 2022
aps-pdw-2016-sql-server-ver15