这个命令有什么问题我总是收到这个错误 #1241 - 操作数应该包含 1 列

Question

select prod_id, prod_code,prod_desc,brand_code,prod_cost,prod_image, category 
    from tbl_products 
    where prod_code in (SELECT DISTINCT prod_code, 
                               sum(del_qty + ret_qty) - SUM(sales_qty) as 'Stocks' 
                        from tbl_initial_inventory
                        GROUP BY prod_code)

Answer 1

Your sub query should return single column so server will able to compile your query properly.

This should be written like below.

select prod_id, prod_code,prod_desc,brand_code,prod_cost,prod_image, category 
from tbl_products 
where prod_code in (SELECT DISTINCT prod_code, 
                    from tbl_initial_inventory)