--문법
CREATE INDEX [인덱스명] ON [테이블명](컬럼1, 컬럼2, 컬럼3.......)
--예제
CREATE INDEX EX_INDEX ON CUSTOMERS(NAME,ADDRESS);
--예제 컬럼 중복 X
CREATE[UNIQUE] INDEX EX_INDEX ON CUSTOMERS(NAME,ADDRESS);
SELECT * FROM USER_INDEXES WHERE TABLE_NAME = 'CUSTOMERS';
--문법
DROP INDEX [인덱스 명]
--예제
DROP INDEX EX_INDEX;