471,078 Members | 766 Online
Bytes | Software Development & Data Engineering Community
Post +

Home Posts Topics Members FAQ

Join Bytes to post your question to a community of 471,078 software developers and data experts.

Problem with procedure

Hi,

I have selected a field name and declared it as varchar, since it is
varchar in table and performed some numeric operation with numbers,

even after i cast the sql in below code, it throws an exception as
"Error converting data type varchar to numeric."

code:

CREATE PROCEDURE x1 (@y1 AS numeric=NULL )AS
declare @z1 Varchar(200)

begin
set @z1= 'and a1.id='
print @y1
print @z1
end

Declare r1 cursor
local Scroll Keyset Optimistic
For
select z1 from employee a1 where z2= @z1 + 45 .....
I want to clear that how can we cast the field with varchar for
numeric operations, i have also tried cast and convert to change it
but all in vain.

Thanks in Advance!

May 2 '07 #1
2 1879
meendar (as****************@gmail.com) writes:
I have selected a field name and declared it as varchar, since it is
varchar in table and performed some numeric operation with numbers,

even after i cast the sql in below code, it throws an exception as
"Error converting data type varchar to numeric."

...
Declare r1 cursor
local Scroll Keyset Optimistic
For
select z1 from employee a1 where z2= @z1 + 45 .....
I want to clear that how can we cast the field with varchar for
numeric operations, i have also tried cast and convert to change it
but all in vain.
SQL Server tries to convert all values in employee.z2 to numeric, and
when this fails for some value, the query fails.

You need to use the CASE expression:

WHERE CASE WHEN ltrim(rtrim(z2)) NOT LIKE '%[^0-9]%'
THEN convert(numeric, z2)
END = @z1 + 45

Now it will only attempt to convert z2 which it consists of digits only.

--
Erland Sommarskog, SQL Server MVP, es****@sommarskog.se

Books Online for SQL Server 2005 at
http://www.microsoft.com/technet/pro...ads/books.mspx
Books Online for SQL Server 2000 at
http://www.microsoft.com/sql/prodinf...ons/books.mspx
May 2 '07 #2
On May 2, 12:10 pm, Erland Sommarskog <esq...@sommarskog.sewrote:
meendar (askjavaprogramm...@gmail.com) writes:
I have selected a field name and declared it as varchar, since it is
varchar in table and performed some numeric operation with numbers,
even after i cast the sql in below code, it throws an exception as
"Error converting data type varchar to numeric."
...
Declare r1 cursor
local Scroll Keyset Optimistic
For
select z1 from employee a1 where z2= @z1 + 45 .....
I want to clear that how can we cast the field with varchar for
numeric operations, i have also tried cast and convert to change it
but all in vain.

SQL Server tries to convert all values in employee.z2 to numeric, and
when this fails for some value, the query fails.

You need to use the CASE expression:

WHERE CASE WHEN ltrim(rtrim(z2)) NOT LIKE '%[^0-9]%'
THEN convert(numeric, z2)
END = @z1 + 45

Now it will only attempt to convert z2 which it consists of digits only.

--
Erland Sommarskog, SQL Server MVP, esq...@sommarskog.se

Books Online for SQL Server 2005 athttp://www.microsoft.com/technet/prodtechnol/sql/2005/downloads/books...
Books Online for SQL Server 2000 athttp://www.microsoft.com/sql/prodinfo/previousversions/books.mspx- Hide quoted text -

- Show quoted text -
Thanks to All

May 4 '07 #3

This discussion thread is closed

Replies have been disabled for this discussion.

Similar topics

2 posts views Thread by Kent Lewandowski | last post: by
4 posts views Thread by Jeff User | last post: by
8 posts views Thread by billmiami2 | last post: by
reply views Thread by leo001 | last post: by

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.