Hello Michael, Wednesday, March 3, 2004, 1:40:00 PM, you wrote:
RM> I have a table, that has a primary key with two columns and want to add a RM> third column to this primary key. RM> Is this possible and when yes: Do I have to delete all tables, that RM> reference to this table? No, you don't have to delete all tables that reference this table. You can drop the key: ALTER TABLE tablename DROP PRIMARY KEY and then re-create it: ALTER TABLE tablename ADD PRIMARY KEY (a,b,c) Please note that if you have a field with a property such as "auto-increment" then dropping the primary key will fail because it will leave an invalid table definition. -- Best regards, Richard Davey http://www.phpcommunity.org/wiki/296.html -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]
