Question

I have the following statement:

DECLARE @Nr_Karton int;

SELECT @Nr_Karton = ISNULL(MAX(Nr), 1000)  FROM W_Karton;

SET @Nr_Karton = @Nr_Karton + 1;

INSERT INTO W_Karton (Container_ID, Nr, Beschrieb, CreationDate, Location) 
  VALUES ('1', @Nr_Karton, '', getDate(), 'Bösingen');

But I get the error:

[SQL] SELECT @Nr_Karton = ISNULL(MAX(Nr), 1000) FROM W_Karton

[Err] 42000 – [SQL Server]Must declare the scalar variable “@Nr_Karton”.

How to get rid of the error?

Answer 1

I did some playing with this. The fictional schema I created was:

CREATE TABLE W_Karton (Container_ID int, Nr int, Beschrieb varchar(1),
CreationDate datetime, Location varchar(10))

Whilst it parsed and ran fine on my local 2008R2 box, the same code did not work when pasted into a SQL Fiddle.

However, if you remove all the semi-colons apart from the last one as per this SQL Fiddle you can see it seems to work fine!

I believe it shouldn’t make any difference, but if you would rather it worked and don’t care about the why, give it a try…