Question

I have a Column(Fields) that contain multiple values for each entity (One to Many).

Example: A record can can reference multiple values in this column.

What I want to do is get only records where highest(MAX) value in this column is equals zero.

The first thing I did was convert the values in the column to Integer, this way I can get the Max Value.

Here is my Code:

How do I get the Max code? If a record has more than one code. I want only record with the Max or highest code of 00000.

I am getting an error with the Having clause since I cannot use Aggregate in the Where Clause.

SELECT CUSTOMER.USER_ID, MAX(CInt(CUSTOMER.REC_CODE)) AS ACTIVE_REC_CODE, 
CUSTOMER.CUS_TYPE


FROM CUSTOMER


WHERE ((CUSTOMER.REC_CODE) IS NOT NULL )


GROUP BY

CUSTOMER.USER_ID, CUSTOMER.REC_CODE, CUSTOMER.CUS_TYPE


HAVING  MAX(CInt([CUSTOMER.REC_CODE])= 00000 )

Answer 1

You are close, but you need to remove CUSTOMER.REC_CODE from your WHERE, since you want the max value of that column. This should work:

SELECT CUSTOMER.USER_ID, MAX(CInt(CUSTOMER.REC_CODE)) AS ACTIVE_REC_CODE, CUSTOMER.CUS_TYPE
FROM CUSTOMER
WHERE CUSTOMER.REC_CODE IS NOT NULL 
GROUP BY CUSTOMER.USER_ID, CUSTOMER.CUS_TYPE
HAVING  MAX(CInt([CUSTOMER.REC_CODE])) = 0