Question

I’m using the following SQL-Statement:

SELECT Col1, count(*) as Col2, Col3
FROM table1
WHERE WeekEnding = '08/26/2012' 
GROUP BY Col1

To get

Col1   Col2  Col3
 NY     2     2
 FL     1     2
 TX     1     2
 NJ     1     2
 WA     2     2
 DE     1     3
 MA     4     4
 AL     3     3

How can I Exclude records where COL2 = COL3, so I get.

Col1   Col2  Col3
 FL     1     2
 TX     1     2
 NJ     1     2
 DE     1     3

Answer 1

You add HAVING – having works after the group is done. Where works before the group.

SELECT Col1, count(*) as Col2, Col3
FROM table1
WHERE WeekEnding = '08/26/2012' 
GROUP BY Col1
HAVING Col2 != Col3

Note: You are grouping by Col1, but not Col3 – that isn’t legal since you are are requesting Col3 in the output.