Disable or Re-create all constraints ( T-SQL )

CREATE PROCEDURE usp_DeleteEmployeesFromDepartment (@departmentId INT)
AS
ALTER TABLE [EmployeesProjects] NOCHECK CONSTRAINT ALL -- disable all constraints in the tables
ALTER TABLE [Employees] NOCHECK CONSTRAINT ALL
ALTER TABLE [Projects] NOCHECK CONSTRAINT ALL
ALTER TABLE [Departments] NOCHECK CONSTRAINT ALL
ALTER TABLE [Addresses] NOCHECK CONSTRAINT ALL
ALTER TABLE [Towns] NOCHECK CONSTRAINT ALL

DELETE FROM [dbo].[Employees]
WHERE [dbo].[Employees].DepartmentID = @departmentId;

DELETE FROM [dbo].[Departments]
WHERE [dbo].[Departments].DepartmentID = @departmentId;

ALTER TABLE [EmployeesProjects] CHECK CONSTRAINT ALL -- re-create all constraints in the tables
ALTER TABLE [Employees] CHECK CONSTRAINT ALL
ALTER TABLE [Projects] CHECK CONSTRAINT ALL
ALTER TABLE [Departments] CHECK CONSTRAINT ALL
ALTER TABLE [Addresses] CHECK CONSTRAINT ALL
ALTER TABLE [Towns] CHECK CONSTRAINT ALL

SELECT COUNT(EmployeeID)
FROM Employees
WHERE DepartmentID = @departmentId;