Oracle-L: RE: Query tuning help needed

From: Jamadagni, Rajendra <Rajendra.Jamadagni_at_espn.com>
Date: Tue, 29 Apr 2003 08:56:56 -0800
Message-ID: <F001.0058C003.20030429085656@fatcity.com>

Brad, Ranga

I am sorry but I have to disagree, stored procedure is not an answer to this problem. I prefer to call this I-saw-a-new-feature-and-i-want-to-use-it syndrome.

How about following ...

SELECT ORIGIN

      ,DESTINATION
	  ,SERVICE_CODE
	  ,CASE WHEN SERVICE_CODE = 'X' THEN AVG(SEG_TIME) + 1
            WHEN SERVICE_CODE = 'Y' THEN AVG(SEG_TIME) + 2
            WHEN SERVICE_CODE = 'Z' THEN AVG(SEG_TIME) + 3
            WHEN SERVICE_CODE = 'Q' THEN AVG(SEG_TIME) + 4 END AS
ADD_ON_VALUE
      ,SYSDATE
	  ,'SYSTEM'
  FROM 
	  (SELECT META_ROUTING_KEY     AS ROUTE_KEY


             ,ST1.STATION_CODE     AS ORIGIN

             ,ST2.STATION_CODE     AS DESTINATION

             ,SERVICE_CODE 

             ,SUM(CASE WHEN t.TYPE IN ('OD','OT','TD','TT') THEN

NVL(TT_TIME_IN_MIN,0) seg_time
        FROM SEG_MIN_TIMES M, STATION ST3, STATION ST4,PRY_TWO_MR_TRANSIT T,
SERVICE 
       WHERE M.ORIGIN = ST3.STATION_CODE 
         AND M.DESTINATION = ST4.STATION_CODE 
         AND ST3.STN_KEY = T.SEG_ORG_STN_KEY 
         AND ST4.STN_KEY = T.SEG_DEST_STN_KEY 
         AND M.SERVICE = SERVICE_CODE 
         AND SERVICE_CODE IN ('X','Y','Z','Q')
       GROUP BY META_ROUTING_KEY, ST1.STATION_CODE,
ST2.STATION_CODE,SERVICE_CODE
	  )

GROUP BY ORIGIN, DESTINATION, SERVICE_CODE /

Test and Test and Test ... this should give you an idea though ... Raj

Rajendra dot Jamadagni at nospamespn dot com All Views expressed in this email are strictly personal. QOTD: Any clod can have facts, having an opinion is an art !

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Author: Jamadagni, Rajendra
  INET: Rajendra.Jamadagni_at_espn.com

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Received on Tue Apr 29 2003 - 11:56:56 CDT