Help required in refining a query

Question

I have a sql query :
select C1 AS No_Of_Completed_WOs, C2 as Wos_with_Soft_Fail, (C1-C2) as Completed_Wos,C3 as Failed_Wos,C4 as TimedOut_Wos from (select (CASE WHEN TBL_WRK_ORD.EXTSYS_ID IS NULL THEN '<NULL>'
ELSE TBL_WRK_ORD.EXTSYS_ID END),
count(case when WO_STAT=104 AND XACTION_TYPE like '%Completion%' then WO_STAT end ) as C1,
count(case when WO_STAT=104 AND XACTION_TYPE like '%Soft Error%' then WO_STAT end ) AS C2,
count(case when WO_STAT=253 then WO_STAT end ) AS C3,
count(case when WO_STAT=251 then WO_STAT end ) AS C4
from TBL_WRK_ORD,TBL_WO_EVENT_QUEUE WHERE TBL_WRK_ORD.WO_ID=TBL_WO_EVENT_QUEUE.WO_ID group by TBL_WRK_ORD.EXTSYS_ID)
The query basically maintains a separate counter for each of the qualifying condition.
C1 : if the WO_STAT is 104 and XACTION_TYPE is '%Completion%'
C2 : if the WO_STAT is 104 and XACTION_TYPE is '%Soft Error%'
C3 : if the WO_STAT is 253
C4 : if the WO_STAT is 251.
Now, the requirement is that we need to fetch distinct records, based on which the summation will be carried upon.
I was not able to incorporate the "distinct" logic in the above query.
Required help in this regards, as how to fetch distinct records and use it in the summation logic.
A quick help would be appreciated and thankful.
Regards
RAT.
Edited by: user9546298 on Feb 24, 2010 6:36 AM
Edited by: user9546298 on Feb 24, 2010 7:06 AM

Answer 1

Here is the sample data :
{code }
Table : TBL_WRK_ORD
WO_ID SCHED_DTS WO_STAT
EXTSYS_ID
A00000001-QRY_ISUP_SERVICE_L 20091126 03:28:02 103
MRK
A00000002-S3 20091201 02:42:34 255
MRK
A00000003-A4 20091201 02:50:28 253
A00000006-ADD1 20091202 05:37:45 104
A00000004-ADD1 20091201 03:40:39 104
A00000005-DNH1 20091202 05:12:06 253
6 rows selected.
Table : TBL_WO_EVENT_QUEUE
WO_ID XACTION_TYPE
A00000001-QRY_ISUP_SERVICE_L WO Accept
A00000001-QRY_ISUP_SERVICE_L WO Startup
A00000001-QRY_ISUP_SERVICE_L WO Completion
A00000002-S3 WO Accept
A00000003-A4 WO Accept
A00000003-A4 WO Startup
A00000003-A4 WO Rollback
A00000003-A4 WO Failure
A00000005-DNH1 WO Rollback
A00000005-DNH1 WO Failure
A00000006-ADD1 WO Accept
A00000006-ADD1 WO Startup
A00000004-ADD1 WO Accept
A00000004-ADD1 WO Startup
A00000004-ADD1 WO Completion
A00000005-DNH1 WO Accept
A00000005-DNH1 WO Startup
A00000006-ADD1 WO Completion
Current output :
NO_OF_COMPLETED_WOS WOS_WITH_SOFT_FAIL COMPLETED_WOS FAILED_WOS TIMEDOUT_WOS
2 0 2 8 0
0 0 0 0 0
Here, as you can see above that the result has duplicates, which caused the counters to show wrong result.
Now, the query should filter based on given criteria and produce the count of the filtered rows.
But doing so, should consider distinct rows for counting.
Also, just placing distinct at counting logic [ pasted by you ] didnot work. I tried it out, but in vain.
Regards
RAT.
Edited by: user9546298 on Feb 24, 2010 7:09 AM