Mysql 基于嵌套查询从表中删除SQL

我在mySQL数据库中有三个表：

orders: order_sequence_number, contact_id, date_ordered ...

orderdetail: order_sequence_number ...

person: contact_id ...

我试图删除三个表中日期排序值早于两年的所有行，但是，日期排序字段仅出现在订单表中，但该表通过订单顺序编号和联系人id字段链接到其他两个

所以，我的想象有点像这样：

SELECT * FROM orders WHERE date_ordered BETWEEN X AND Y

那就凭那张唱片

DELETE FROM orderdetail WHERE orderdetail.order_sequence_number IN (THE ABOVE)

等人表。。。但是没有运气

在我看来，似乎是某种嵌套子查询，但我很难理解如何进行这种查询，也无法理解它的复杂本质

---

任何指点都将不胜感激。

这正是您所写的内容：

DELETE FROM orderdetail WHERE orderdetail.order_sequence_number IN (
    SELECT distinct(order_sequence_number) FROM orders WHERE date_ordered BETWEEN X AND Y
)

---

这和你写的差不多：

DELETE FROM orderdetail WHERE orderdetail.order_sequence_number IN (
    SELECT distinct(order_sequence_number) FROM orders WHERE date_ordered BETWEEN X AND Y
)

---

如果您有一个大表

订单

，最好使用

---

如果您有一个大表

订单

，最好使用

DELETE FROM orderdetail od 
WHERE EXISTS ( SELECT NULL 
               FROM orders o 
               WHERE date_ordered BETWEEN X AND Y
                 and od.order_sequence_number = o.order_sequence_number
             )