SQL statement help needed

Question

I am sure some of you will laugh lol, but I am drawing a blank and need some assistance if anyone is willing to help:
I have this query:
SELECT DISTINCT ID
FROM (SELECT productcode
FROM sforce_product2
WHERE productcode NOT LIKE 'DSXXX%'
AND productcode NOT LIKE 'DO NOT USE%'
AND productcode NOT LIKE 'MAXXXX%'
AND isactive = 'true'
MINUS
SELECT productcode
FROM vew_product_export) a,
sforce_product2
WHERE a.productcode = sforce_product2.productcode
which returns 112 ID's (which is wrong)
The inner SELECT statement:
SELECT productcode
FROM sforce_product2
WHERE productcode NOT LIKE 'DSXXX%'
AND productcode NOT LIKE 'DO NOT USE%'
AND productcode NOT LIKE 'MAXXXX%'
AND isactive = 'true'
MINUS
SELECT productcode
FROM vew_product_export
returns 106.
Am I doing something simple wrong or is my query just mangled!
TIA,
Mike

Answer 1

  SELECT DISTINCT ID
    FROM (SELECT productcode
            FROM sforce_product2
           WHERE productcode NOT LIKE 'DSXXX%'
             AND productcode NOT LIKE 'DO NOT USE%'
             AND productcode NOT LIKE 'MAXXXX%'
             AND isactive = 'true'
          MINUS
          SELECT productcode
            FROM vew_product_export) a,
          sforce_product2
   WHERE a.productcode = sforce_product2.productcodethe above code is returning an ID column which i think most probable from the sforce_product2 table
while this query below returns the 106 value that is coming from the column productcode.
  SELECT productcode
    FROM sforce_product2
   WHERE productcode NOT LIKE 'DSXXX%'
     AND productcode NOT LIKE 'DO NOT USE%'
     AND productcode NOT LIKE 'MAXXXX%'
     AND isactive = 'true'
  MINUS
  SELECT productcode
    FROM vew_product_exportso i think there is nothing wrong because if you will review the 112 is from the column ID while the 106 is from the column productcode.