我正在尝试做这样的事情,所以结果是 2 个单独选择的组合
SELECT
order_number,placed_by,placed_when,updated_by,updated_when,
(SELECT SUM(qty_order<>qty_rec)
FROM 1_purchase_orders
WHERE order_number=order_number AND line_number<>0)
WHERE
supp_number=4 AND line_number=0;
我正在尝试做这样的事情,所以结果是 2 个单独选择的组合
SELECT
order_number,placed_by,placed_when,updated_by,updated_when,
(SELECT SUM(qty_order<>qty_rec)
FROM 1_purchase_orders
WHERE order_number=order_number AND line_number<>0)
WHERE
supp_number=4 AND line_number=0;
您在查询中使用的相关子查询必须只返回一个标量值。像这样的东西:
SELECT
t1.order_number,
t1.placed_by,
t1.placed_when,
t1.updated_by,
t1.updated_when,
(SELECT SUM(t2.qty_order <> t2.qty_rec)
FROM 1_purchase_orders t2
WHERE t2.order_number = t1.order_number AND t2.line_number <> 0
ORDER BY qty_order LIMIT 1)
FROM 1_purchase_orders t1
WHERE t1.supp_number = 4 AND t1.line_number=0;