Delete Parent record if child is not present

Question

I am creating menu and submenus in a table variable. ( Typical parent child records in the same table) ParentID coll is null for all Top menus. And for their child ParentID

Answer 1

Without seeing your table structure it's difficult to tell you the exact query you would need but, if I understand your question correctly, you just need to do something like this:

DELETE T 
FROM MyTable T 
WHERE NOT EXISTS(SELECT * FROM MyTable WHERE ParentID = T.MenuID)
    AND T.ParentID IS NULL

This query does a correlated subquery to find all the menu records that don't have child records. It uses SQL's EXISTS clause