Solution 3, Sql Server

Solution 3

/*
Problem:
    Write a SQL statement to list all employees that are not managers.
    Add your solution at the end.

Expected Output:
    EmployeeId	FirstName	LastName
    3			Mason		Farrell
    8			Isabella	Portman
    9			Ethan		Firth
    10			Emily		Theron
*/

-- Create a table called Employees
CREATE TABLE Employees (
    EmployeeId         INT     PRIMARY KEY,
    FirstName          VARCHAR(200),
    LastName           VARCHAR(200),
    ManagerEmployeeId  INT)
GO

-- Fill Employee table
INSERT INTO Employees VALUES(1, 'Noah', 'Clooney', NULL)
INSERT INTO Employees VALUES(2, 'Liam', 'Brolin', 1)
INSERT INTO Employees VALUES(3, 'Mason', 'Farrell', 1)
INSERT INTO Employees VALUES(4, 'Emma', 'Jolie', 1)
INSERT INTO Employees VALUES(5, 'Jacob', 'Foxx', 2)
INSERT INTO Employees VALUES(6, 'William', 'Damon', 4)
INSERT INTO Employees VALUES(7, 'Olivia', 'Johansson', 5)
INSERT INTO Employees VALUES(8, 'Isabella', 'Portman', 1)
INSERT INTO Employees VALUES(9, 'Ethan', 'Firth', 6)
INSERT INTO Employees VALUES(10, 'Emily', 'Theron', 7)
GO

------------------------------------------------------------------
-- Sql Server 2014 Express Edition - 12.0.2000.8
-- Solution.
------------------------------------------------------------------

SELECT EmployeeId, FirstName, LastName
FROM Employees
WHERE NOT EmployeeId IN (SELECT DISTINCT ManagerEmployeeId FROM Employees WHERE ManagerEmployeeId IS NOT NULL )


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