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#1
November 10th, 2004, 04:08 PM
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Select Query (not in question)
I am trying to select a column from table A where that value does not appear in table B. Here is what I am using
Code:
SELECT A from tableA where A not in (Select distinct B from tableB) But it returns no results However if I use Code:
SELECT A from tableA I get 211 records and I use Code:
Select distinct B from tableB I get 105 records. So in theory I should have 106 rows returned from my query. I am assuming it is something simple I am missing (hopefully), and that the experts here can find it faster than I can! Thanks Chris
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#2
November 10th, 2004, 04:21 PM
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Don't you have it backwards?
Select distinct B from tableB where B not in (SELECT A from tableA) Since you want it to look in the table with more records.
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#3
November 11th, 2004, 09:40 AM
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That gives me the same result.
I want to compare the table with more records, to one with fewer, and figure out the IDs that are in table A but not B.
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#4
November 11th, 2004, 04:42 PM
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I found the problem. I had a stray null value in table B.
Code:
SELECT A from tableA where A not in (Select distinct B from tableB where B is not null) did the trick
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