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Microsoft sql query error

Posted on 2014-09-23
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Last Modified: 2014-09-23
Hi Experts,

I am not able to execute attached query because of below error. Could you please advise how to fix below error.

Error:
Msg 8117, Level 16, State 1, Line 1
Operand data type bit is invalid for sum operator.
select CAST(CAST(SUM([Del]) AS DECIMAL) / COUNT([Del]) AS DECIMAL(36, 4)) AS [Del_%]
from dbo.TEMP_vw

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Question by:sqldba2013
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10 Comments
 
LVL 15

Expert Comment

by:Haris Djulic
ID: 40338692
try this

select CAST((CAST(SUM([Del]) AS DECIMAL) / COUNT([Del])) AS DECIMAL(36, 4)) AS [Del_%]
from dbo.TEMP_vw

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0
 
LVL 51

Accepted Solution

by:
Vitor Montalvão earned 1000 total points
ID: 40338701
If Del is a bit column then you can't use SUM directly on this field. You'll need something like this:
select CAST(SUM(CASE Del
		WHEN 1 THEN 1
		ELSE 0
		END) / COUNT(Del) AS  DECIMAL(36, 4)) [Del_%]
from dbo.TEMP_vw

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0
 
LVL 2

Assisted Solution

by:Vishal Patil
Vishal Patil earned 1000 total points
ID: 40338705
Hello sqldba2013,

If you are using bit column you can not directly apply Sum operation on it. Try with following query.

select CAST(CAST(SUM(case [Del] when 'True' then 1 else 0 end) AS DECIMAL) / COUNT([Del]) AS DECIMAL(36, 4)) AS [Del_%]
from dbo.TEMP_vw

Open in new window

0
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Author Comment

by:sqldba2013
ID: 40338709
I have tried with above query and still I'm getting same error.

Msg 8117, Level 16, State 1, Line 1
Operand data type bit is invalid for sum operator.
0
 
LVL 15

Expert Comment

by:Haris Djulic
ID: 40338711
can you post few rows from this table ?
0
 
LVL 51

Expert Comment

by:Vitor Montalvão
ID: 40338715
Less code a without  CASE keyword^:
select SUM(CAST(Del AS DECIMAL(36,4)))/ COUNT(Del) [Del_%]
from dbo.TEMP_vw

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0
 

Author Closing Comment

by:sqldba2013
ID: 40338718
Thanks Vitor Montalvão and Vishal Patil for your help. Now I am able to execute above query without error.

I am marking this case as closed.
0
 
LVL 2

Expert Comment

by:Vishal Patil
ID: 40338723
If your column type is bit then you should check for the values 'True'  or 'False'. Bit column wont return you the values 1 or 0 directly.

Please try following query. If this wont work then we need to check the structure of your table.

select CAST(CAST(SUM(case [Del] when 'True' then 1 else 0 end) AS DECIMAL) / COUNT([Del]) AS DECIMAL(36, 4)) AS [Del_%]
from dbo.TEMP_vw

Open in new window

0
 
LVL 51

Expert Comment

by:Vitor Montalvão
ID: 40338814
@Vishal

Bit datatype means binary values, so 0 and 1 should be the accepted values.
Boolean datatype accepts TRUE and FALSE but SQL Server doesn't have a Boolean datatype. And as you can see you need to write 'True' and 'False' as VARCHAR so SQL Server can convert it to bit.
0
 
LVL 51

Expert Comment

by:Vitor Montalvão
ID: 40338817
Forgot to post the MSDN article
0

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