Mysql 如果一行中的值存在于另一行SQL中，则删除重复行

我在删除所有具有特定值的行，然后删除与已删除的行列具有相同值的其他行时遇到问题。 下面是我现在拥有的一个例子：

SELECT Race.intRaceID, Register.intRegID, Member.intMemberID
FROM Race
LEFT JOIN Register ON Race.intRaceID=Register.intRaceID
LEFT JOIN Member ON Register.intMemberID=Member.intMemberID

这给了我：

+------------+-----------+-------------+
| intRaceID  | intRegID  | intMemberID |
+------------+-----------+-------------+
|       100  | 10        | 1           |
|       100  | 40        | 2           |
|       200  | NULL      | NULL        |
|       300  | 30        | 2           |
|       400  | 20        | 4           |
|       500  | NULL      | NULL        |
+------------+-----------+-------------+

所以，我试图做的是删除一个特定的intMemberID（保留空值）和所有与之关联的intRaceID。 我补充说

但这不会删除与intMemberID关联的所有ID。 任何帮助都将不胜感激

我想展示的表格是：

+------------+-----------+-------------+
| intRaceID  | intRegID  | intMemberID |
+------------+-----------+-------------+
|       200  | NULL      | NULL        |
|       400  | 20        | 4           |
|       500  | NULL      | NULL        |
+------------+-----------+-------------+

---

我认为您必须编写如下查询中的

WHERE

子句：

SELECT Race.intRaceID, Register.intRegID, Member.intMemberID
FROM Race
LEFT JOIN Register ON Race.intRaceID = Register.intRaceID
LEFT JOIN Member ON Register.intMemberID = Member.intMemberID
WHERE Race.intRaceID NOT IN (
   SELECT Race.intRaceID
   FROM Race 
   INNER JOIN Register ON Race.intRaceID = Register.intRaceID
   INNER JOIN Member ON Register.intMemberID = Member.intMemberID
   WHERE Member.intMemberID = 2)
ORDER BY intRaceID;

这样，就排除了

intRaceID

与

intMemberID

相关且值为

2

的所有记录

---

intRaceID位于两行：intMemberID=1和=2。因此，如果排除intMemberID=2，则仍然保持intRaceID=100。顺便问一下，为什么在执行SELECT查询时要谈论删除？你说的是从select中排除吗？是的，对不起，我的意思是从select中排除整行。我将编辑我的帖子以显示我想要的表格可能的副本

+------------+-----------+-------------+
| intRaceID  | intRegID  | intMemberID |
+------------+-----------+-------------+
|       200  | NULL      | NULL        |
|       400  | 20        | 4           |
|       500  | NULL      | NULL        |
+------------+-----------+-------------+

SELECT Race.intRaceID, Register.intRegID, Member.intMemberID
FROM Race
LEFT JOIN Register ON Race.intRaceID = Register.intRaceID
LEFT JOIN Member ON Register.intMemberID = Member.intMemberID
WHERE Race.intRaceID NOT IN (
   SELECT Race.intRaceID
   FROM Race 
   INNER JOIN Register ON Race.intRaceID = Register.intRaceID
   INNER JOIN Member ON Register.intMemberID = Member.intMemberID
   WHERE Member.intMemberID = 2)
ORDER BY intRaceID;