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MySQL查询选择最高和最低薪水行？

2024-05-09 11:21:03 339

为此，将子查询与MIN()和一起使用MAX()。要同时显示最大值和最小值，请使用UNIONALL。让我们首先创建一个表-

mysql> create table DemoTable
   -> (
   -> EmployeeName varchar(20),
   -> EmployeeSalary int
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into DemoTable values('Bob',8800);
mysql> insert into DemoTable values('Chris',9800);
mysql> insert into DemoTable values('David',7600);
mysql> insert into DemoTable values('Sam',9600);

使用select语句显示表中的所有记录-

mysql> select *from DemoTable;

这将产生以下输出-

+--------------+----------------+
| EmployeeName | EmployeeSalary |
+--------------+----------------+
|          Bob |           8800 |
|        Chris |           9800 |
|        David |           7600 |
|          Sam |           9600 |
+--------------+----------------+
4 rows in set (0.00 sec)

这是选择最低工资行的查询-

mysql> select *from DemoTable
   -> where EmployeeSalary in ( select max(EmployeeSalary) from DemoTable
   -> union all
   -> select min(EmployeeSalary) from DemoTable
   -> );

这将产生以下输出-

+--------------+----------------+
| EmployeeName | EmployeeSalary |
+--------------+----------------+
|        Chris |           9800 |
|        David |           7600 |
+--------------+----------------+
2 rows in set (0.05 sec)

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MySQL查询选择最高和最低薪水行？

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