Mysql Microsoft SQL-返回每个部门的男性、女性和员工总数
我正在努力解决这个问题 本质上,我需要做的是创建一个查询,返回一个统计每个部门所有女性、男性和总员工的表 到目前为止,我已经能够显示所有部门以及女性、男性和员工的总数,但不是每个部门(它显示每个部门的相同数量) 如何仅显示每个部门的男性、女性和员工总数 问题和代码如下。以及代码生成的输出 提前谢谢各位Mysql Microsoft SQL-返回每个部门的男性、女性和员工总数,mysql,sql,ddl,dml,Mysql,Sql,Ddl,Dml,我正在努力解决这个问题 本质上,我需要做的是创建一个查询,返回一个统计每个部门所有女性、男性和总员工的表 到目前为止,我已经能够显示所有部门以及女性、男性和员工的总数,但不是每个部门(它显示每个部门的相同数量) 如何仅显示每个部门的男性、女性和员工总数 问题和代码如下。以及代码生成的输出 提前谢谢各位 -- Username: -- Q1004 For each of the different departments, show the number of current female, ma
-- Username:
-- Q1004 For each of the different departments, show the number of current female, male and total
-- employees currently employed.
-- Schemas: HumanResources
-- Example output:
-- departmentName female male totalEmployeeCount
-- Production 40 120 160
-- Write your query below
SELECT Name AS departmentName,
(SELECT COUNT(gender) FROM AdventureWorksDB.HumanResources.Employee WHERE Gender = 'F') AS female,
(SELECT COUNT(gender) FROM AdventureWorksDB.HumanResources.Employee WHERE Gender = 'M') AS male,
(SELECT COUNT(gender) FROM AdventureWorksDB.HumanResources.Employee) AS totalEmployeeCount
FROM AdventureWorksDB.HumanResources.Department N
JOIN AdventureWorksDB.HumanResources.EmployeeDepartmentHistory EDH
ON N.DepartmentID = EDH.DepartmentID
JOIN AdventureWorksDB.HumanResources.Employee E
ON EDH.BusinessEntityID = E.BusinessEntityID
GROUP BY Name
输出结果如下所示
Department female|male |totalEmployeeCount
Engineering 84 |206 |290
Tool Design 84 |206 |290
Sales 84 |206 |290
Marketing 84 |206 |290
Purchasing 84 |206 |290
Research and Development 84 |206 |290
Production 84 |206 |290
使用条件聚合:
SELECT Name AS departmentName,
SUM(CASE WHEN e.gender = 'F' THEN 1 ELSE 0 END) as famale,
SUM(CASE WHEN e.gender = 'M' THEN 1 ELSE 0 END) as male,
COUNT(*) as totalEmployeeCount
FROM AdventureWorksDB.HumanResources.Department N JOIN
AdventureWorksDB.HumanResources.EmployeeDepartmentHistory EDH
ON N.DepartmentID = EDH.DepartmentID JOIN
AdventureWorksDB.HumanResources.Employee E
ON EDH.BusinessEntityID = E.BusinessEntityID
GROUP BY Name