Where if @param1 <>0 left(value1, 4)=@param1 otherwise don't execute this part in the where condition

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Hi,

where if @param1 <>0   left(value1,4)=@param1

otherwise don't execute this part in the where condition
How to write the query?

Soumya

What I have tried:

where LEFT(ISNULL(value1, 0000), 4) =

CASE
WHEN @param1 <> 0 THEN CAST(@param1 AS NVARCHAR(12))
END

But this won't execute if

@param1

=0

Posted 12-Nov-17 23:22pm

soumyaraj

Updated 12-Nov-17 23:44pm

v4

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2 solutions

Solution 1

SQL

WHERE ((@PARAM1<>0 AND left(value1,4)=@param1) OR @PARAM1= 0)

Posted 12-Nov-17 23:42pm

itsmypassion

Updated 12-Nov-17 23:43pm

v2

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Suvendu Shekhar Giri · Accepted Answer · 2017-11-12T23:44:00

Solution 2

Try following-

SQL

WHERE (@param1 == 0) OR (LEFT(ISNULL(value1, 0000), 4) =@param1)

Logical OR does the trick here. When value of @param1 is 0 it will not execute the second part.

Hope, it helps :)
Please let me know if this doesn't help.

Posted 12-Nov-17 23:44pm

Suvendu Shekhar Giri

Updated 12-Nov-17 23:45pm

v2

Comments

soumyaraj 13-Nov-17 7:03am

Yes it works!
Thank you for your help

Suvendu Shekhar Giri 13-Nov-17 7:40am

Glad that it helped! :)