单项选择题
A.DROP TABLE CUSTOMER B.DROP CUSTOMER C.DELETE TABLE CUSTOMER D.DELETE CUSTOMER
A.ALTER TABLE CUSTOMER DROP column LOGOUTTIME B.UPDATE TABLE DROP column LOGOUTTIME C.ALTER TABLE CUSTOMER DROP LOGOUTTIME D.UPDATE TABLE DROP LOGOUTTIME
A.ALTER TABLE CUSTOMER RENAME CUSTOMER_CHANGE B.ALTER TABLE CUSTOMER RENAME TO CUSTOMER_CHANGE C.RENAME TABLE CUSTOMER TO CUSTOMER_CHANGE D.RENAME TABLE CUSTOMER CUSTOMER_CHANGE