查询开通了远程登录业务的客户姓名,unix服务器ip地址，os帐号名,开通日期，下列sql语句正确的是：( )
select a.real_name,s.unix_host,s.os_username,s.create_date
from account a join service s on a.id = s.account_id;
select a.real_name,s.unix_host,s.os_username,s.create_date
from account a , service s on a.id = s.account_id;
select a.real_name,s.unix_host,s.os_username,s.create_date
from account a join service s
where a.id = s.account_id;
select a.real_name,s.unix_host,s.os_username,s.create_date
from account a join service s, a.id = s.account_id;
