UPDATE

The table games shows the year and the city hosting the Olympic Games.

**games**
yr	city
2000	Sydney
2004	Athens
2008	Beijing
2012	London

The table number shows the year and the city hosting the Olympic Games.

**number**
yr	number
2000	1
2004	2
2008	3
2012	4

schema:scott

 DROP TABLE games

 CREATE TABLE games(
  yr INTEGER,
  city VARCHAR(20));
INSERT INTO games VALUES (2000,'Sydney');
INSERT INTO games VALUES (2004,'Athens');
INSERT INTO games VALUES (2008,'Beijing');
INSERT INTO games VALUES (2009,'London');

CREATE TABLE number(
  yr INTEGER,
  number VARCHAR(20));
INSERT INTO number VALUES (2000,'1');
INSERT INTO number VALUES (2004,'2');
INSERT INTO number VALUES (2008,'3');
INSERT INTO number VALUES (2009,'4');

The UPDATE statement can be used to change a values in rows that already exists. In this example we move the 2012 games from London to Paris.

UPDATE scott.games SET city='Paris' WHERE yr = 2012;
SELECT * FROM scott.games;

UPDATE games SET city='Paris' WHERE yr = 2012;
SELECT * FROM games;