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Message Posted: Thu, 08 Sep 2016 @ 19:30:30 GMT
<-- Anonymously Posted: Thursday, September 08, 2016 09:54 -->
Is there a better way to rewrite the below query?
This delete is skewed and the impact cpu is at least 50 times more than the sum(cpu).
DELETE FROM DB1.TAB1_stg? A DB1.TAB2 B WHERE A.id=B.id AND A.Y1=B.Y1 AND A.Z1=B.Z1 AND A.XYZ=B.XYZ AND A.PQR=B.PQR AND A.MNO=B.MNO AND A.DATE < B.DATE AND A.IJK=B.IJK tab1_stg: PI: ( id ,y1 ,z1 ,xyz ,pqr ); - Stage table. Count - 5million Tab2: PI: id count - 300million
Both the tables are slightly skewed.? Stats are existing on PI and join columns.
Is there a better way to rewrite this query or should the PI of stage table be same as tab2 or viceversa as the structure of both the tables is same?
Appreciate your response!
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