Prepare data:
USE AdventureWorks2008 GO CREATE TABLE HumanResources.Employee2 ( EmployeeID int NOT NULL, ManagerID int NULL REFERENCES HumanResources.Employee2(EmployeeID), JobTitle nvarchar(50) NOT NULL, LastName nvarchar(50) NOT NULL, FirstName nvarchar(50) NOT NULL, CONSTRAINT PK_Employee2_EmployeeID PRIMARY KEY CLUSTERED (EmployeeID ASC) ); INSERT INTO HumanResources.Employee2(EmployeeID,ManagerID,JobTitle,LastName,FirstName) VALUES (1, NULL, 'CEO','Smith', 'Hunter'), (2, 1, 'CFO', 'Jones', 'Drew'), (3, 1, 'COO','Lenzy','Sheila'), (4, 1, 'CTO', 'Huntington', 'Karla'), (5, 4, 'VP of Engineering', 'Gutierrez', 'Ron'), (8, 5, 'VP of Engineering', 'Gutierrez', 'Ron'), (9, 5, 'Software Engineer', 'Bray', 'Marky'), (10 ,5, 'Data Architect', 'Cheechov', 'Robert'), (11 ,5, 'Software Engineer', 'Gale', 'Sue'), (6, 4, 'VP of Professional Services', 'Cross', 'Gary'), (7, 4, 'VP of Security','Lebowski','Jeff');
Define the function
USE AdventureWorks2008 GO create function dbo.getManagedEmployee(@managerId int) returns @employees table( employeeId int, managerId int ) as begin insert @employees select EmployeeID, ManagerID from HumanResources.Employee2 where managerid=@managerId declare @current int select @current=min(employeeid) from @employees where managerid=@managerid while @current is not null begin insert @employees select * from getManagedEmployee(@current) select @current=min(employeeid) from @employees where managerid=@managerid and employeeid>@current end return end
Call the function:
USE AdventureWorks2008 select * from getManagedEmployee(4)