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This article mainly introduces how to use INFORMATION_SCHEMA in MYSQL. It is very detailed and has certain reference value. Friends who are interested must finish reading it.

INFORMATION_SCHEMA in MY SQL.

Mainly encapsulates some system information.

Open the online help and type "INFORMATION_SCHEMA" in the index

CHECK_CONSTRAINTS

Each CHECK constraint for the current database has a row in this view. The information schema view returns information about the objects on which the current user has permissions. The INFORMATION_SCHEMA.CHECK_CONSTRAINTS view is based on sysobjects and syscomments system tables.

COLUMN_DOMAIN_USAGE

Each column with a user-defined data type in the current database has a row in this view. The information schema view returns information about the objects on which the current user has permissions. The INFORMATION_SCHEMA.COLUMN_DOMAIN_USAGE view is based on sysobjects, syscolumns, and systypes system tables.

TABLES

Each table in the current database to which the current user has permissions has a row in this view. The INFORMATION_SCHEMA.TABLES view is based on the sysobjects system table.

Every database can be seen.

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