How to find ID not in the master ID table
问题 Let's say I have a master table for Products , and another table which keeps lists of ProductIDs . Table name: Products -------------------- ProductID, Title, Price 1, Title 1, 12.00 2, Title 2, 15.00 4, Title 4, 11.50 8, Title 8, 13.89 11, Title 11, 12.00 Table name: ListOfProducts -------------------------- SomeID, ProductIDs 34, 4,8,1 35, 8,10,2 Now, you can see that in the table ListOfProducts , record with SomeID=35 , the list of products is 8,10,2 . How can I use SQL to quickly find out