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Message Posted: Fri, 04 Apr 2008 @ 10:47:08 GMT


     
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Subj:   Re: Duplicate Row Error during an Update
 
From:   Gaitonde, Amol A

You are trying to update one row with 2 values( May be different or same). the query is logically incorrect.

Example

     TABLE EMP
     NAME    TASK_SCORE   YEAR
     Jon       1.105      2000
     Peter     1.107      2000
     Jon       1.105      2001
     Peter     1.103      2001

     TABLE EMP
     NAME    SALARY
     Jon     100000
     Peter   100000

If you write a query like below you might get a duplicate row error

     Update B
     Set salary = slary* Tas_Scoe
     Where a.name = B.name

Because I have missed putting filter on year and the salary field is getting updated with two values



     
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