Posted on 2011-03-19
Last Modified: 2012-05-11

SELECT * FROM Product_Categories WHERE Product_ID = '101'

Returns me 2 items one where Category_ID = 0 and another where it is something different then 0

How would I delete all items in the table where  Category_ID = 0 IF there is at least one OTHER item where  Category_ID is NOT 0
Question by:vbnetcoder
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LVL 33

Accepted Solution

knightEknight earned 500 total points
ID: 35172006
-- Run this as a SELECT first to make sure it only affects the rows you want to delete.  I also suggest you backup this table first.

select Product_ID
-- delete
from Product_Categories
where Category_ID = 0
  and Product_ID in (
         select Product_ID
         from Product_Categories
         group by Product_ID
         having count(*) > 1

LVL 33

Expert Comment

ID: 35172009
you can change the top line to SELECT * instead of SELECT Product_ID
LVL 24

Expert Comment

ID: 35172017
Delete from FROM Product_Categories where (Category_ID = 0) and (select count(Category_ID) from Product_Categories where Category_ID <> 0) > 1

Author Closing Comment

ID: 35172044

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