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Apr 2, 2011, 07:32 #1
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- Sep 2008
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identifying records not in a table
I have just realised I am missing a foreign key constraint in one of my tables.
so now I need to find what records of the menus (child), table, are not in the menus_sequencer (parent), table.
this query gives me back nearly 400 reaulsts, which is just about all of them and surely, that is not the correct result.
This next query gives me over 5000 results when there are only 68 and 84 records respectively, in each table.
SELECT m.business_id , m.content_category , m.menu_name FROM menus AS m left outer join menus_sequencer AS ms ON ms.content_category = m.content_category WHERE ms.menu_name != m.menu_name
what way should I be writing this query?