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niranjankumark
Posting Yak Master
164 Posts |
 Posted - 2008-11-26 : 10:54:59
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| Will qry output will be the same ???? how will the exeution goes ???only difference in group by ,,QRY 1=========SELECT CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END SUM(T.C4) ,SUM(T.C5)FROM T1, T2WHERE T1.C3 = T2.C3GROUP BY CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END QRY 2 =========SELECT CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END SUM(T.C4) ,SUM(T.C5)FROM T1, T2WHERE T1.C3 = T2.C3GROUP BY T1.C1 , T1.C2 |
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sakets_2000
Master Smack Fu Yak Hacker
1472 Posts |
Posted - 2008-11-26 : 11:45:12
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| It'll differ. |
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sakets_2000
Master Smack Fu Yak Hacker
1472 Posts |
Posted - 2008-11-26 : 11:48:50
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| Your 2nd query will group it for all unique combinations of T1.C1 , T1.C2. The first one will for unique combinations of CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END ,CASE WHEN T1.C1 = 'A' THEN T1.C2 END |
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QUERY ..