oracle 12c (12.2.0.1) - 테스트용 테이블 생성
CREATE TABLE people ( name VARCHAR2(100), gender VARCHAR2(100), age NUMBER (10) ); INSERT INTO people VALUES ('hoho', 'male', 21); INSERT INTO people VALUES ('huhu', 'female', 21); INSERT INTO people VALUES ('yoho', 'male', 22); INSERT INTO people VALUES ('horololo', 'female', 22); INSERT INTO people VALUES ('ryan', 'male', 23); INSERT INTO people VALUES ('apeach', 'female', 23); INSERT INTO peo..
