sp_special_columns

Retrieves the information about columns within a specified table or view.

The optimal set of columns that uniquely identifies a row in the table or view
The columns that are automatically updated when any value in the row is updated by a transaction

Syntax

sp_special_columns table_name [, table_owner]
 [, table_qualifier] [, col_type]

table_name – is the name of the table. Wildcard-character search patterns are not supported.
table_owner – is the owner of the table. Wildcard-character search patterns are not supported.
table_qualifier – is ignored. Leave blank or set to NULL.
col_type – is a value that requests information about columns of a specific type:
- “R” returns information about columns with values that uniquely identify any row in the table.
- “V” returns information about columns with values that are automatically generated by a target each time a row is inserted or updated.

See ODBC Datatypes for matching ODBC integer identifiers returned in the TYPE_NAME and DATA_TYPE columns of the result set.