A. delete * from user where name=”jack” B. drop from user where name=”jack” C. alter from user where name=”jack” D. delete user where name=”jack”
下面三條語句的執(zhí)行結(jié)果為()
A.刪除掉 ‘產(chǎn)品數(shù)據(jù)庫’ B.把‘產(chǎn)品數(shù)據(jù)庫’改名為’product’ C.刪除掉‘product’ D.把’product’改名為‘產(chǎn)品數(shù)據(jù)庫
A. SELECT * FROM CUSTOMERS WHERE AGE=20 B. DROP FROM CUSTOMERS WHERE AGE=20 C. SELECT FROM CUSTOMERS WHERE AGE=20 D. DELETE FROM CUSTOMERS WHERE CUSTID=5