选择查看hz表的前两条信息的命令()。
A.select top 2 * from hz
B.select top 2 % from hz
C.select head 2 * from hz
D.select head 2 % from hz
A.select top 2 * from hz
B.select top 2 % from hz
C.select head 2 * from hz
D.select head 2 % from hz
第1题
A.update hz set tea_name='leon' where tea_name='lisa'
B.update hz set tea_name='lisa' where tea_name='leon'
C.insert into tea_name (hz) values ('lisa')
D.insert into tea_name (hz) values ('leon')
第2题
A.alter database hz drop column tea_name
B.alter table hz drop column tea_name
C.alter table tea_name drop column hz
D.alter database tea_name drop column hz
第4题
A.找管理员从后台查
B.DESC命令
C.SHOWTABLES命令
D.SELECTLAST_MODIFY_TIMEFROMTABLE
第5题
A.ALTER表名ADDPRIMARYKEYON(字段名)
B.SHOWCREATETABLE表名
C.SHOWINDEXFROM表名
D.CREATEINDEX索引名ON表名
第7题
A.show columns
B.show columns from customers
C.show table
D.show database