in opertor with case

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can we compare two table columns records using this logic in case statement

SQL

update Table1 set Description=
(
case
when (select Column1 from Table1 where Column1 IN (select Column2 from Table2) )  then 'data is match'
else 'Data is not match'  end
)

Posted 22-Feb-15 7:09am

Rajnish D mishra

Updated 22-Feb-15 7:26am

PIEBALDconsult

v2

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PIEBALDconsult · Accepted Answer · 2015-02-22T07:46:00

If this is SQL Server, I'd use a LEFT OUTER JOIN instead. Subqueries and especially IN on subqueries perform very poorly and should not be used when a JOIN will do the trick.

SQL

UPDATE #Table1 
SET [Description]=
  CASE 
    WHEN #Table2.[Column1] IS NOT NULL THEN 'data is match'
    ELSE 'Data is not match'
    END
FROM #Table1 
LEFT OUTER JOIN #Table2
ON #Table1.[Column1]=#Table2.[Column1]

Tomas Takac · Accepted Answer · 2015-02-22T07:16:00

Solution 1

You should be able to do that using EXISTS:

SQL

update Table1 set Description=
(
case
when exists(select * from Table1 where Column1 IN (select Column2 from Table2) ) then 'data is match'
else 'Data is not match' end
)

Posted 22-Feb-15 7:16am

Tomas Takac

Comments

Rajnish D mishra 22-Feb-15 13:25pm

THANKS IT WORKS FINE