Update data from existing column
SQL> SQL> create table gift( 2 gift_id integer primary key 3 ,emp_id integer 4 ,register_date date not null 5 ,total_price number(7,2) 6 ,deliver_date date 7 ,deliver_time varchar2(7) 8 ,payment varchar2(2) 9 ,emp_no number(3,0) 10 ,deliver_name varchar2(35) 11 ,message varchar2(100) 12 ); Table created. SQL> SQL> insert into gift(gift_id,emp_id,register_date,total_price,deliver_date,deliver_time,payment,emp_no,deliver_name,message)values 2 (1,1,'14-Feb-1999', 123.12, '14-Feb-1999', '12 noon', 'CA',1, null, 'Happy Birthday to you'); 1 row created. SQL> insert into gift(gift_id ,emp_id ,register_date ,total_price ,deliver_date ,deliver_time ,payment ,emp_no,deliver_name ,message)values 2 (2,1,'14-Feb-1999', 50.98, '14-feb-1999', '1 pm', 'CA',7, 'name1', 'Happy Birthday'); 1 row created. SQL> insert into gift(gift_id ,emp_id ,register_date ,total_price ,deliver_date ,deliver_time,payment ,emp_no,deliver_name ,message )values 2 (3, 2,'14-Feb-1999', 35.99, '14-feb-1999', '1 pm', 'VS',2, 'Tom', 'Happy Birthday'); 1 row created. SQL> insert into gift(gift_id ,emp_id ,register_date ,total_price ,deliver_date ,deliver_time,payment ,emp_no,deliver_name ,message )values 2 (4, 2,'14-Feb-1999', 19.95, '14-feb-1999', '5 pm', 'CA',2, 'Mary', 'Happy Birthday'); 1 row created. SQL> insert into gift(gift_id ,emp_id ,register_date ,total_price ,deliver_date ,deliver_time,payment ,emp_no,deliver_name ,message)values 2 (5, 6,'4-mar-1999', 10.95, '5-mar-1999', '4:30 pm', 'VS', 2, 'Jack', 'Happy Birthday'); 1 row created. SQL> SQL> SQL> update gift 2 set deliver_date = register_date + 10, 3 message = 'OCP' 4 where gift_id = 301; 0 rows updated. SQL> SQL> SQL> drop table gift; Table dropped.