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Finding sum for varchar value

Author

Topic

sanjnep
Posting Yak Master

191 Posts

Posted - 2006-05-02 : 16:20:40

Can someone help me to find sum of varchar values?
Here is sample
create table #test (val varchar(10))
select val from #test
val
----------
a
b
c
d
------------

I need abcd if I run some thing like this
select sum(val) from #test

-------
abcd

Sanjeev shrestha

Nitu
Yak Posting Veteran

81 Posts

Posted - 2006-05-02 : 16:49:09

I am sure there are lots of different ways to do this, but this is what i came up with,


Declare @Test_sum varchar(10)
Declare @val varchar(10)

DECLARE test CURSOR FOR

select val from #test
	
	OPEN test

	FETCH test INTO @val
	
	WHILE @@Fetch_Status = 0
	
	   BEGIN
		if @Test_sum is null
			Set @Test_sum = @val
		else
			Set @Test_sum = @Test_sum + @val	
	   FETCH test INTO @val
 	   END
	
	   CLOSE test
	
	   DEALLOCATE test

select @Test_sum as Test_sum

Hope this Helps.
Let me know if you find another way to do this, since i am kind of new to sql and still learning.

--Nitu

blindman
Master Smack Fu Yak Hacker

2365 Posts

Posted - 2006-05-02 : 17:06:02

[code]declare @MyFunkyVarcharSum varchar(4000)

select @MyFunkyVarcharSum = isnull(@MyFunkyVarcharsum, '') + Val
from #test
order by val

select @MyFunkyVarcharSum[/code]

madhivanan
Premature Yak Congratulator

22864 Posts

Posted - 2006-05-03 : 02:25:31

>>select sum(val) from #test

That wont be sum but concatenation

>>Let me know if you find another way to do this, since i am kind of new to sql and still learning.

Dont use Cursor. Use blindman's approach
For concatenating values based on other columns, refer this
http://sqljunkies.com/WebLog/amachanic/archive/2004/11/10/5065.aspx?Pending=true

Madhivanan

Failing to plan is Planning to fail

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