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docs/Notes/MySQL/DQL语句-连接查询.md

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@@ -362,10 +362,11 @@ mysql> select e.ename 员工, l.ename 领导 from emp e join emp l on e.mgr = l.
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13 rows in set (0.01 sec)
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```
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![自连接](./DQL语句-连接查询/自连接.png)
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::: 提示
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可以发现连接条件是:**`e.mgr = l.empno(员工的领导编号=领导的员工编号)`**
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![自连接](./DQL语句-连接查询/自连接.png)
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可以发现连接条件是:**`e.mgr = l.empno(员工的领导编号=领导的员工编号)`**
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**注意:`KING这个员工没有查询出来`。如果想将`KING也查询出来,需要使用外连接`**
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:::

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