text: CREATE TABLE Teachers(
  TeacherID INT NOT NULL,
  [Name] NVARCHAR(50) NOT NULL,
  ManagerID INT NOT NULL
  )
  
  ALTER TABLE Teachers
  	ADD CONSTRAINT PK_Teachers
  	PRIMARY KEY(TeacherID)
  
  ALTER TABLE Teachers
  	ADD CONSTRAINT FK_Teachers_Teachers
  	FOREIGN KEY(ManagerID)
  	REFERENCES Teachers(TeacherID)