查找MySQL Employee表的最高和第二最高薪水？

您可以使用LIMIT OFFSET从Employee表中获得最高和第二最高工资。语法如下-

SELECT yourColumnName1,yourColumnName2,....N from yourTableName ORDER BY
yourColumnName desc limit 2 offset 0;

为了理解上述语法，让我们创建一个表。创建表的查询如下-

mysql> create table EmployeeMaxAndSecondMaxSalary
   -> (
   -> EmployeeId int,
   -> Employeename varchar(20),
   -> EmployeeSalary int
   -> );

使用插入命令在表中插入一些记录-

mysql> insert into EmployeeMaxAndSecondMaxSalary values(1,'John',34566);

mysql> insert into EmployeeMaxAndSecondMaxSalary values(2,'Bob',56789);

mysql> insert into EmployeeMaxAndSecondMaxSalary values(3,'Carol',44560);

mysql> insert into EmployeeMaxAndSecondMaxSalary values(4,'Sam',76456);

mysql> insert into EmployeeMaxAndSecondMaxSalary values(5,'Mike',65566);

mysql> insert into EmployeeMaxAndSecondMaxSalary values(6,'David',89990);

mysql> insert into EmployeeMaxAndSecondMaxSalary values(7,'James',68789);

mysql> insert into EmployeeMaxAndSecondMaxSalary values(8,'Robert',76543);

使用select语句显示表中的所有记录。查询如下-

mysql> select *from EmployeeMaxAndSecondMaxSalary;

以下是输出-

+------------+--------------+----------------+
| EmployeeId | Employeename | EmployeeSalary |
+------------+--------------+----------------+
|          1 | John         | 34566          |
|          2 | Bob          | 56789          |
|          3 | Carol        | 44560          |
|          4 | Sam          | 76456          |
|          5 | Mike         | 65566          |
|          6 | David        | 89990          |
|          7 | James        | 68789          |
|          8 | Robert       | 76543          |
+------------+--------------+----------------+
8 rows in set (0.00 sec)

以下是使用限制偏移量获取最高和第二最高工资的查询-

mysql> select EmployeeId,Employeename,EmployeeSalary from EmployeeMaxAndSecondMaxSalary order by
   -> EmployeeSalary desc limit 2 offset 0;

输出显示2名雇员的最高薪水记录-

+------------+--------------+----------------+
| EmployeeId | Employeename | EmployeeSalary |
+------------+--------------+----------------+
|          6 | David        |          89990 |
|          8 | Robert       |          76543 |
+------------+--------------+----------------+
2 rows in set (0.00 sec)