相关疑难解决方法(0)

我有以下两个SQL表(在MySQL中):

Phone_book
+----+------+--------------+
| id | name | phone_number |
+----+------+--------------+
| 1  | John | 111111111111 |
+----+------+--------------+
| 2  | Jane | 222222222222 |
+----+------+--------------+

Call
+----+------+--------------+
| id | date | phone_number |
+----+------+--------------+
| 1  | 0945 | 111111111111 |
+----+------+--------------+
| 2  | 0950 | 222222222222 |
+----+------+--------------+
| 3  | 1045 | 333333333333 |
+----+------+--------------+

如何找出调用由人,他们作了phone_number不在Phone_book？期望的输出是:

Call
+----+------+--------------+
| id | date | phone_number |
+----+------+--------------+
| 3  | 1045 …

我根本不熟悉SQL,所以希望有人可以帮我查询一个查询,该查询将查找父表中没有子表中记录的所有记录.

以下工作为我找到特定子字段值的父记录...

`SELECT    ParentTable.ParentID
 FROM      ParentTable INNER JOIN
             ParentTable ON ParentTable.ParentID = ChildTable.ChildID
 WHERE     (ChildTable.ChildField_ = '2131')
 Group By
   ParentTable.ParentID
 Having
   count(distinct ChildTable.ChildField) > 0`

我可以更改where子句,了解如何查找具有零子记录计数的父项.

谢谢.