Question

I have code like this:

CREATE FUNCTION gantistok (@id   VARCHAR(8),
                           @id_t INT)
RETURNS INT
  BEGIN
      DECLARE @tahu  INT,
              @tempe INT,
              @hasil INT;

      SELECT @tahu = CONVERT(INT, stok)
      FROM   barang
      WHERE  id_barang = @id;

      SELECT @tempe = CONVERT(INT, jumlah)
      FROM   det_trans
      WHERE  id_det_trans = @id_t;

      SET @hasil = @tahu - @tempe;

      RETURN @hasil
  END  

Why doesn’t it work? I am getting this error:

Msg 402, Level 16, State 1, Procedure gantistok, Line 5
The data types text and varchar are incompatible in the equal to operator.

Answer 1

you are using wrong syntax

it should be

CONVERT(expr,type)

and type must be SIGNED [INTEGER]

REFERENCE