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# odbc_foreignkeys

(PHP 4 >= 4.0.0)

odbc_foreignkeys -- Returns a list of foreign keys in the specified table or a list of foreign keys in other tables that refer to the primary key in the specified table

## Description

``int odbc_foreignkeys` (int connection_id, string pk_qualifier, string pk_owner, string pk_table, string fk_qualifier, string fk_owner, string fk_table)`

odbc_foreignkeys() retrieves information about foreign keys. Returns an ODBC result identifier or `FALSE` on failure.

The result set has the following columns:

- PKTABLE_QUALIFIER

- PKTABLE_OWNER

- PKTABLE_NAME

- PKCOLUMN_NAME

- FKTABLE_QUALIFIER

- FKTABLE_OWNER

- FKTABLE_NAME

- FKCOLUMN_NAME

- KEY_SEQ

- UPDATE_RULE

- DELETE_RULE

- FK_NAME

- PK_NAME

If `pk_table` contains a table name, odbc_foreignkeys() returns a result set containing the primary key of the specified table and all of the foreign keys that refer to it.

If `fk_table` contains a table name, odbc_foreignkeys() returns a result set containing all of the foreign keys in the specified table and the primary keys (in other tables) to which they refer.

If both `pk_table` and `fk_table` contain table names, odbc_foreignkeys() returns the foreign keys in the table specified in `fk_table` that refer to the primary key of the table specified in `pk_table`. This should be one key at most.

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