Question

I need to insert data by selecting some part of the values needed base on the supplied values from the user.

In a scenerio, the client will provide staff_name, customer_name, and product_name. The INSERT will look up the necessary data from other tables to pull the corresponding ids.

This is what I currently have

INSERT INTO [Order](product_id, 
                    customer_id, 
                    staff_id, 
                    vehicle_regno, 
                    order_details, 
                    total_price, 
                    order_date)
     SELECT     
         stock.id, 
         customers.id AS Expr1, 
         Staff.id AS Expr2, 
         @vehicle_regno AS Expr3, 
         @order_details AS Expr4, 
         @total_price AS Expr5, 
         @order_date AS Expr6
     FROM         
         stock 
     CROSS JOIN
         customers CROSS 
     JOIN
         Staff
     WHERE     
         (stock.name = @stock_name) 
         AND (customers.name = @customers_name) 
         AND (Staff.name = @staff_name)

but it does not insert any record

Thanks for your help

Answer 1

Actually, you have two separate queries here, which can be tested separately.

I mean, why don’t you test this part first:

SELECT     
     stock.id, 
     customers.id AS Expr1, 
     Staff.id AS Expr2, 
     @vehicle_regno AS Expr3, 
     @order_details AS Expr4, 
     @total_price AS Expr5, 
     @order_date AS Expr6
 FROM         
     stock 
 CROSS JOIN
     customers CROSS 
 JOIN
     Staff
 WHERE     
     (stock.name = @stock_name) 
     AND (customers.name = @customers_name) 
     AND (Staff.name = @staff_name)

And see if there are any data returned.