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In this video we will discuss joining 3 tables in SQL Server. Joining 3 tables (or even more) is very similar to joining 2 tables.
Write a query to join 3 the tables and retrieve EmployeeName, DepartmentName and Gender.
Query:
SELECT EmployeeName, DepartmentName, Gender
FROM Employees
JOIN Departments ON Employees.DepartmentID = Departments.DepartmentID
JOIN Genders ON Employees.GenderID = Genders.GenderID
Write a query to show the total number of employees by DEPARTMENT and by GENDER.
Query:
SELECT DepartmentName, Gender, COUNT(*) as TotalEmployees
FROM Employees
JOIN Departments ON Employees.DepartmentID = Departments.DepartmentID
JOIN Genders ON Employees.GenderID = Genders.GenderID
GROUP BY DepartmentName, Gender
ORDER BY DepartmentName, Gender
