MYSQL Select/Group By：如何根据某个组成员的值从结果中删除该组？

考虑下面的事件表。OrderID字段是Orders表的外键

OrderID EventType TimeAdded* Processed 1 ... 3 Hours Ago 0 2 ... 5 Minutes Ago 0 1 ... 2 Hours Ago 0 1 ... 1 Hour Ago 0 3 ... 12 Minutes ago 1 3 ... 3 Hours Ago 0 2 ... 2 Hours Ago 0

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我只是不确定正确的语法是什么？

我想大致是这样的：

SELECT OrderID
FROM OrderEvents
WHERE Processed=0
GROUP BY OrderID
HAVING MAX(TimeAdded) < (NOW() - 1500);

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记住，我在这里工作是盲目的。我认为1500是正确的，因为现在在数字上下文中使用的函数

我认为大致是这样的：

SELECT OrderID
FROM OrderEvents
WHERE Processed=0
GROUP BY OrderID
HAVING MAX(TimeAdded) < (NOW() - 1500);

---

记住，我在这里工作是盲目的。我认为1500是正确的，因为现在在数字上下文中使用的函数

这将完成MySQL Workbench中测试的工作：

SELECT * FROM OrderEvents WHERE Processed = 0 GROUP BY OrderID
    HAVING MAX(TimeAdded) < (NOW() - INTERVAL 15 MINUTE);

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这将完成MySQL Workbench中测试的工作：

SELECT * FROM OrderEvents WHERE Processed = 0 GROUP BY OrderID
    HAVING MAX(TimeAdded) < (NOW() - INTERVAL 15 MINUTE);