text: create table Department
  	(
  		deptno number(1),
  		deptname varchar(20),
  		location varchar(20),
  		constraint dept_pk primary key(deptno),
  		constraint dept_no check(deptno in(1,2,3,4)),
  		constraint dept_loc check(location in('Kolkata','Bangalore','Pune'))
  	);
  insert into Department values (1,'Research','Kolkata');
  insert into Department values (2,'Marketing','Bangalore');
  insert into Department values (3,'Sales','Pune');
  insert into Department values (4,'Accounts','Kolkata');