Question

I use the following t-sql code for assign to variable a value obtained from select statement

 DECLARE @cfMitt nvarchar(16)

 SET @cfMitt = (SELECT CfMittente
    FROM Messaggi
    WHERE IDMessaggio = @IDMessaggio)

If I want use multiple assignement I try with the following code, but something is wrong:

DECLARE @cfMitt nvarchar(16)
DECLARE @cfDest nvarchar(16)

SET @cfMitt, @cfDest= (SELECT CfMittente, CfDestinatario
FROM Messaggi
WHERE IDMessaggio = @IDMessaggio)

Where is the error?

Answer 1

Set only assigns one value at a time.

You should use

   SELECT @cfMitt = CfMittente, 
          @cfDest = CfDestinatario
   FROM Messaggi
   WHERE IDMessaggio = @IDMessaggio