假设users表中的telnumber列存储电话号码信息,则查询不是以7开头的所有电话号码的查询语句是()
A.
select telnumber from users where telnumber is not '%7'
B.
select telnumber from users where telnumber like '%7%'
C.
select telnumber from users where telnumber not like '7%'
D.
select telnumber from users where telnumber like '[1-6]%'