Hi, > > Why not? What's wrong with this: > > > > BORROWER > > BorrowerID > > > > BOOKS > > BookID > > BorrowerID (nullable) > > > > FK from Books.BorrowerID to Borrower.BorrowerID > > > > I haven't checked, but this _should_ be possible. > > > > With regards, > > Its a foreign key, you can not null foreign keys.. Thats the problem.
If this really is the case with MySQL, then this is the only database engine that I know that doesn't allow this. With regards, Martijn Tonies Database Workbench - developer tool for InterBase, Firebird, MySQL & MS SQL Server. Upscene Productions http://www.upscene.com -- MySQL General Mailing List For list archives: http://lists.mysql.com/mysql To unsubscribe: http://lists.mysql.com/[EMAIL PROTECTED]