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isnull help

Author

Topic

kirank
Yak Posting Veteran

58 Posts

Posted - 2010-08-17 : 08:22:22


UPDATE E
   SET E.bid = (SELECT TOP 1 IntBd FROM TblB WHERE ltrim(rtrim(BName)) like LTRIM(RTRIM(E.[BName]))+'%')

FROM #TmpFile E

hi on the above update how i can insert 0 values instead of null
on #TmpFile table (temp) how i can set 0
can i use


select CASE WHEN ISNULL((SELECT TOP 1 IntBd FROM TblB WHERE ltrim(rtrim(BName)) like LTRIM(RTRIM(E.[BName]))+'%'),0)

but it give me an error , whn above query(inner) will not return any records

if i try
select isnull(null,0) it return 0 but why not in my query
how i can madify it
help me

Kristen
Test

22859 Posts

Posted - 2010-08-17 : 08:30:09

select ~~CASE WHEN~~ ISNULL((SELECT TOP 1 IntBd FROM TblB WHERE ltrim(rtrim(BName)) like LTRIM(RTRIM(E.[BName]))+'%'),0)

should do the trick

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2010-08-17 : 09:13:48

Top 1 without order by doesn't make use. Consider using min/max value of column. If you want random value use same method you used

Madhivanan

Failing to plan is Planning to fail

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2010-08-17 : 10:28:42

[code]
UPDATE E
SET E.bid = B.IntBd

FROM #TmpFile E
OUTER APPLY(SELECT TOP 1 IntBd FROM TblB WHERE ltrim(rtrim(BName)) like LTRIM(RTRIM(E.[BName]))+'%' ORDER BY PK)B
[/code]

PK is primary key of TblB

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SQL Server MVP
http://visakhm.blogspot.com/

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