Need help in combining two similair SQLs into one

Question

DB Version:10gR2
I need to combine the following two queries into one query and return the following three columns
Unprocessed Quantity1,Unprocessed Quantity2, Total Uprocessed Cost
Unprocessed Quantity1 can be determined using
select t.ITEM, sum(t.QTY)
  from (select cd.ITEM_ID ITEM, cd.ACTL_QTY QTY
          from CONVEY_HDR ch, CURRENT_INVN cd, ALLOC_HDR ah
         where ........
        UNION
        select sd.ITEM_ID ITEM, sd.INVN_QTY QTY
          from shp_dtl pd
        UNION
        Select item_id, inv_qty from another table
    GROUP BY.....
ITEM        SUM(T.QTY)
88JAT                25
000002395           1
300108396          27
000004397           7
73984290           15Unprocessed quantity2 can be determined using
select t.ITEM, sum(t.QTY)
     from (select cd.ITEM_ID ITEM, cd.ACTL_QTY QTY
             from CONVEY_HDR ch, CURRENT_INVN cd, ALLOC_HDR ah
    where rownum<6
   group by t.ITEM
   order by t.ITEM;
ITEM        SUM(T.QTY)
189436171           2
009438837         160
000040685          16
000032410          18Total Unprocessed Cost can found using the sum of Quantities for a particular Item from above two queries multiplied by
ITEM_COST for that ITEM (which is found in ITEM_DTL table). For every item; ITEM_DTL.item_id=CARTON_dTL.carton_id
Total Unprocessed Cost= (Unprocessed Quantity1+Unprocessed Quantity2)*ITEM_DTL. ITEM_COST
Note: Unprocessed Quantity2 query looks very similair to first SQL in UNION of Unprocessed Quantity1, but ah.STAT_CODE < 90 for Unprocessed Quantity2 query
Edited by: user636669 on Jan 14, 2009 10:40 AM
Edited by: user636669 on Jan 14, 2009 10:57 AM
Corrected typo
Edited by: user636669 on Jan 14, 2009 7:07 PM

Answer 1

Hi,
Put the two queries you posted in sub-queries. You can then use their result sets as if they were tables.
Do something like this:
WITH  uq1  AS
    select t.ITEM, sum(t.QTY) AS total
      from (select cd.ITEM_ID ITEM, cd.ACTL_QTY QTY
              from CASE_HDR ch, CASE_DTL cd, ASN_HDR ah
    ... the rest of your first query goes here
,     uq2  AS
    select t.ITEM, sum(t.QTY)  AS total
         from (select cd.ITEM_ID ITEM, cd.ACTL_QTY QTY
                 from CASE_HDR ch, CASE_DTL cd, ASN_HDR ah
    ... the rest of your second query goes here
SELECT  uq1.item
,       uq1.total  AS "Unprocessed Quantity1"
,       uq2.total  AS "Unprocessed Quantity2"
,       (uq1.total + uq2.total) * dtl.item_cost
                   AS "Total Uprocessed Cost"
FROM    uq1
JOIN    uq2               ON uq1.item = uq2.item
JOIN    item_dtl   dtl    ON uq1.item = dtl.item;If some items are in uq1 but not in uq2 (or vice-versa), then you'll probably want to do outer joins.
I don't have any of the tables used, so I can't test this myself.
If you need more help. then post a little sample data from each of the tables, and the results you want from that data.
It looks like you're doing the same join in each of your original queries.
You can add another sub-query that does that join once, and then use that sub-query in sub-queries uq1 and uq2.