单项选择题
A.select *from table like ‘张%’；B.select *form table where name like ”_张”；C.select *form table where name like ”张%”；D.select *form table where name like ”%张%”；
A.numberB.floatC.doubleD.decimal
A.show databases；B.use database_name；C.drop database db_name；D.show table；