如何通过指定和地点获得最高和最低工资组

Question

我有两张桌子的数据。在第一个表格中，我有员工ID和他们的名字。在第二个表格中，我有员工详细信息（例如工资，地点，加入日期，处理的项目，指定）。

我正在尝试编写一个查询，我可以按位置和指定来提供最高和最低工资组的数据。这就是我到目前为止所做的：

SELECT E.EMPID,I.EMPID, E.EMPNAME, I.EMPNAME,
B.[MAXIMUM SALARY],F.[MINIMUM SALARY],
B.DESIG,F.DESIG,B.LOCATION,F.LOCATION
FROM
((SELECT MAX (SALARY) [MAXIMUM SALARY], LOCATION, DESIG
FROM
EMPDETAILS
GROUP BY LOCATION, DESIG) B
JOIN
(SELECT C.EMPID,C.SALARY,C.GENDER,C.DESIG,
C.JOINON,C.LOCATION,C.PROJECTS,D.EMPNAME 
FROM EMPDETAILS C
JOIN
EMPLOYEE D 
ON C.EMPID=D.EMPID) E
ON E.DESIG=B.DESIG AND E.SALARY=B.[MAXIMUM SALARY] AND E.LOCATION =             
B.LOCATION) 
FULL OUTER JOIN[enter image description here][1]
((SELECT MIN(SALARY) AS [MINIMUM SALARY], LOCATION, DESIG
FROM EMPDETAILS
GROUP BY LOCATION, DESIG) F
JOIN
(SELECT G.EMPID,H.EMPNAME,G.DESIG,G.GENDER,
G.JOINON,G.LOCATION,G.PROJECTS,G.SALARY
FROM EMPDETAILS G
JOIN EMPLOYEE H
ON G.EMPID=H.EMPID) I
ON I.DESIG=F.DESIG AND F.[MINIMUM SALARY]=I.SALARY AND     
I.LOCATION=F.LOCATION)
ON I.DESIG=E.DESIG
ORDER BY B.LOCATION, f.location

给我：

Answer 1

不知道你真正想要/需要什么，但如果你想要employeeID级别的结果，你需要这样的东西：

SELECT 
    d.*,
    min_salary,
    max_salary
FROM 
    EMPDETAILS d JOIN
    EMPLOYEE e ON 
    d.EMPID=e.EMPID JOIN
    (SELECT
        empid,
        MIN(salary) AS min_salary,
        MAX(salary) AS max_salary
    FROM
        EMPDETAILS
    GROUP BY
        empid) m ON
    e.empid = m.empid

如果您想要按照代码中的LOCATION，DESIG分组的最低/最高工资，您需要将这些结果与员工级别的详细信息分开返回：

SELECT
    LOCATION, DESIG,
    MIN(salary) AS min_salary,
    MAX(salary) AS max_salary
FROM
    EMPDETAILS
GROUP BY
    LOCATION, DESIG

您的min和max分组不需要单独的子查询，您不需要多次加入详细信息表，也不需要full outer join