【原创】MySQL同时取出最大值和最小值所在整行

老规矩；直接上群友问题

这是原求助者的答案

 下面放我的方法

为了说明这个问题：

先创建一张表，并插入数据

CREATE TABLE overtime (
    employee_name VARCHAR(50) NOT NULL,
    department VARCHAR(50) NOT NULL,
    hours INT NOT NULL,
    PRIMARY KEY (employee_name , department)
);

INSERT INTO overtime(employee_name, department, hours)
VALUES('Diane Murphy','Accounting',37),
('Mary Patterson','Accounting',74),
('Jeff Firrelli','Accounting',40),
('William Patterson','Finance',58),
('Gerard Bondur','Finance',47),
('Anthony Bow','Finance',66),
('Leslie Jennings','IT',90),
('Leslie Thompson','IT',88),
('Julie Firrelli','Sales',81),
('Steve Patterson','Sales',29),
('Foon Yue Tseng','Sales',65),
('George Vanauf','Marketing',89),
('Loui Bondur','Marketing',49),
('Gerard Hernandez','Marketing',66),
('Pamela Castillo','SCM',96),
('Larry Bott','SCM',100),
('Barry Jones','SCM',65); 

**Schema (MySQL v8.0)**

 | employee_name | department | hours |

| ----------------- | ---------- | ----- |
| Anthony Bow | Finance | 66 |
| Barry Jones | SCM | 65 |
| Diane Murphy | Accounting | 37 |
| Foon Yue Tseng | Sales | 65 |
| George Vanauf | Marketing | 89 |
| Gerard Bondur | Finance | 47 |
| Gerard Hernandez | Marketing | 66 |
| Jeff Firrelli | Accounting | 40 |
| Julie Firrelli | Sales | 81 |
| Larry Bott | SCM | 100 |
| Leslie Jennings | IT | 90 |
| Leslie Thompson | IT | 88 |
| Loui Bondur | Marketing | 49 |
| Mary Patterson | Accounting | 74 |
| Pamela Castillo | SCM | 96 |
| Steve Patterson | Sales | 29 |
| William Patterson | Finance | 58 |

---

下面是查询sql

with t1 as (SELECT
    1 as id,
    hours min_hours,
    FIRST_VALUE(employee_name) OVER (
        ORDER BY hours
    ) least_emp
    
FROM
    overtime 
    limit 1),
    
t2 as (SELECT
    1 as id,
    hours max_hours,
    FIRST_VALUE(employee_name) OVER (
        ORDER BY hours desc
    ) first_emp
    
FROM
    overtime 
    limit 1)
select t1.min_hours,t1.least_emp,t2.max_hours,t2.first_emp
from t1 ,t2
where t1.id=t2.id    
    
    ; 

具体代码查看本人创建的

https://www.db-fiddle.com/f/91TmSU9SwVwFBqCTHPPyh8/1

https://www.db-fiddle.com/f/91TmSU9SwVwFBqCTHPPyh8/18 

 函数介绍

 

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