WHEN MATCHED 사용 * member 의 자료 SQL> select * from member; USERID USERNAME PASSWD REGDATE COUNTRY ---------- ---------- ---------- ------------ ---------- modify test 1234 11-JAN-12 Korea test test 1234 11-JAN-12 Korea gyh214 young 1234 10-JAN-12 Korea gy14 hoon 1234 10-JAN-12 Korea *member2의 자료 SQL> select * from member2; USERID USERNAME PASSWD REGDATE COUNTRY ---------- ---------- ---------- ---..