Question

I want to do this

SELECT *
  FROM sales_order_header       
 WHERE order_reference LIKE @order_reference + '%'
   AND ((@booked_in IS NULL) OR ( booked_in = @booked_in))
   AND ((@depot_assigned IS NULL) OR ( IF @depot_assigned = 'Y' depot_code <> ' ' ELSE depot_code = ' ') )

I’m sure you can all guess the OR ( IF @depot_assigned etc ) bit is failing.

How can i do something like this or do i have to do it as two separate select statements depending on the value of the @depot_assigned parameter.

Answer 1

SELECT
        *

    FROM
        sales_order_header

    WHERE
        order_reference LIKE @order_reference + '%'         AND
        ((@booked_in IS NULL) OR ( booked_in = @booked_in)) AND
        ((@depot_assigned IS NULL) OR 
            ( @depot_assigned = 'Y' AND depot_code <> ' ' ) OR
            ( @depot_assigned <> 'Y' AND depot_code = ' ') )