Question

Similar but NOT IDENTICAL to SQL Server 2000 – Query a Table’s Foreign Key relationships

I need a T-SQL statement that will work SQL 2000 that given a table name, will return the foreign key relationships for that table e.g.

Table MyFristTable has a foreign key to MySecondTable, where MyFirstTable.ColA must be in MySecondTable.ColB. I’d be delighted, if the sql statement (or stored proc) is ran for MyFirstTable and returned a result set on the lines of

Column | FK_Table      | FK_COLUMN
----------------------------------
ColA   | MySecondTable | ColB

NB: I have samples for SQL 2005 that won’t work because they rely on sys.foreign_key_columns

I’d rather not have to parse out the results of the sp_help statement.

Thanks,

Answer 1

DECLARE @tableName sysname

SET @tableName = '' -- Your table name goes here

SELECT
    c.name
    , target.name
    , targetc.name
FROM
    -- source table
    sysobjects t
    -- source column
    INNER JOIN syscolumns c ON t.id = c.id
    -- general constraint
    INNER JOIN sysconstraints co ON t.id = co.id AND co.colid = c.colid
    -- foreign key constraint
    INNER JOIN sysforeignkeys fk ON co.constid = fk.constid
    -- target table
    INNER JOIN sysobjects target ON fk.rkeyid = target.id
    -- target column
    INNER JOIN syscolumns targetc ON fk.rkey = targetc.colid AND fk.rkeyid = targetc.id
WHERE
    t.name = @tableName

NOTE I have I think used only those system views available in SQL 2000 (ie the sysXXX ones rather than the SQL 2005 sys.XXX ones) but I have only actually tested this in a SQL 2005 environemnt.