mysql禁止root用户远程连接的命令是(____)。
A.update user set host = "localhost" where user = "root" and host = "
B.; @@update user set host = localhost" where user = "root" and host = "%";
C.update user set host = "localhost" where user = "root" and host = "*";
D.update user set host = "localhost" where user = "root" and host = ".";
正确答案是B