Question

Here is my CTE/SQL statement:

with cte as (
    ...
)

select 1, 0, q.quadrantID, 0, '', 1
from Quadrants q
where q.quadrantID not in (select cte.quadrantID from cte)
order by quadrantID ASC

The Quadrants table has 6 records.

The CTE in this scenario doesn’t return any records. My select should return the 6 records from Quadrants, but it doesn’t. Why is that?

If I run the following statement:

select 1, 0, q.quadrantID, 0, '', 1
from Quadrants q
where q.quadrantID not in (5)
order by quadrantID ASC

It will return 5 of the 6 rows, like it’s supposed to.

Answer 1

Are you aware that NOT IN will return incorrect results if your CTE is returning NULL in the data.

Try running this query and see the results you will get zero records

select 1, 0, q.quadrantID, 0, '', 1 
from Quadrants q 
where q.quadrantID not in (NULL,5) 
order by quadrantID ASC

You should write your query with NOT EXISTS read this for further info.

http://decipherinfosys.wordpress.com/2007/01/21/32/

Edit: I wrote your query with NOT EXISTS clause ,Try this

select 1, 0, q.quadrantID, 0, '', 1 
from Quadrants q 
where NOT EXISTS
(
SELECT 1  from cte WHERE cte.quadrantID=q.quadrantID 
)
order by quadrantID ASC