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KEY_COLUMN_USAGE (Transact-SQL)

Returns one row for each column that is constrained as a key in the current database. This information schema view returns information about the objects to which the current user has permissions.

To retrieve information from these views, specify the fully qualified name of INFORMATION_SCHEMA.view_name.

Column name Data type Description

CONSTRAINT_CATALOG

nvarchar(128)

Constraint qualifier.

CONSTRAINT_SCHEMA

nvarchar(128)

Name of schema that contains the constraint.

CONSTRAINT_NAME

nvarchar(128)

Constraint name.

TABLE_CATALOG

nvarchar(128)

Table qualifier.

TABLE_SCHEMA

nvarchar(128)

Name of schema that contains the table.

TABLE_NAME

nvarchar(128)

Table name.

COLUMN_NAME

nvarchar(128)

Column name.

ORDINAL_POSITION

int

Column ordinal position.

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