[英]Update a table by selecting data from another table MySQL query
我有两张桌子
订购表
or_id count status
1 2 0
2 3 0
3 2 0
订单明细表
ordetail or_id status
1 1 1
2 1 1
3 2 0
4 2 1
5 2 1
6 3 1
7 3 1
如果Order_Details表中对应的order_id的所有状态均为1,我想将订单表状态更新为1.我尝试使用此查询,但由于子查询返回的行数超过1而无法使用
UPDATE order o JOIN order_detail od ON o.or_id = od.or_id SET o.Status = 1 WHERE
o.or_id= (SELECT or_id FROM order_detail GROUP BY or_id
HAVING SUM(status = 1) = COUNT(*) )
提前致谢
根据状态更新的第一个查询:
UPDATE `order` o
JOIN Order_Detail od ON o.or_id = od.order_id
SET o.Status = 1
WHERE od.Status = 1
第二个查询检索:
SELECT DISTINCT order_id
FROM Order_Detail
WHERE status = 0
注意:如果一个订单有2个order_details,则1)的状态为0,2)status =1。由于存在一行状态为0的行,因此上面的查询将包含该订单-如果只想检索订单ID都是status =0。然后使用此查询:
SELECT order_id
FROM Order_Detail
GROUP BY order_id
HAVING SUM(status = 0) = COUNT(*)
更新:根据注释,由于仅在所有订单明细均为1的情况下才希望将状态设置为1,因此请使用以下更新查询:
UPDATE `order` o
JOIN (
SELECT order_id
FROM Order_Detail
GROUP BY order_id
HAVING SUM(status = 1) = COUNT(*)
) og ON o.or_id = og.order_id
SET o.Status = 1
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