单项选择题
A.赋予username 用户在任意用户任意表的select 权限B.登录到username 用户C.不赋予username 用户选择权限D.赋予username 用户全局在任意表任意列的select 权限
A.columns_priv 权限表B.tables_priv 权限表C.db 权限表D.procs_priv 权限表
A.create user username@localhost identified by 123456B.create user ’username’@’localhost’identified by123456C.create user username@localhost identified by ’123456’D.create user ’username’@’localhost’identified by ’123456’