public IEnumerable<dynamic> GetTagRelationWithOper(string custid, string tagid)
{
const string sql = @"select b.custname, a.createdtime from cust_tag_relation as a
left join cust_info as b on a.fromid=b.innerid
where tagid=@tagid and toid=@custid;";
var list = Helper.Query<dynamic>(sql, new { tagid, custid });
return list;
}