A.ALTERTABLECUSTOMERADDCOLUMN"LOGOUTTIME"TIMESTAMP(6)
B.UPDATETABLECUSTOMERADDCOLUMN"LOGOUTTIME"TIMESTAMP(6)
C.UPDATETABLECUSTOMERADD("LOGOUTTIME"TIMESTAMP(6))
D.ALTERTABLECUSTOMERADD("LOGOUTTIME"TIMESTAMP(6))
第1题:
A.DROP TABLE CUSTOMER
B.DROP CUSTOMER
C.DELETE TABLE CUSTOMER
D.DELETE CUSTOMER
第2题:
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
第3题:
下面选项中,表示日期和时间的数据类型是()
A.DECIMAL(6,2)
B.DATE
C.YEAR
D.TIMESTAMP
第4题:
A.ALTER TABLE CUSTOMER DROP column LOGOUTTIME
B.UPDATE TABLE DROP column LOGOUTTIME
C.ALTER TABLE CUSTOMER DROP LOGOUTTIME
D.UPDATE TABLE DROP LOGOUTTIME
第5题:
4、下面选项中,表示日期和时间的数据类型是()
A.DECIMAL(6,2)
B.DATE
C.YEAR
D.TIMESTAMP