oracle excersies start from lower to top

select * from emplrkb;
	desc emplrkb;
	commit;
	insert into emplrkb values ('kunal',420,30000);
	select * from emplrkb;
	insert into emplrkb values ( null, 101,'');
	select * from emplrkb;
	insert into emplrkb values ( null, 101,'empty character');
	insert into emplrkb values ( null, 101,empty character);
	select * from emplrkb;