数据库模型 这个基本上是浓缩 Jerry Tom博客的内容,作为参考http://www.cnblogs.com/mbailing/archive/2012/07/31/2616779.html 说明以后再写. 城市实体类 public partial class city { public int ID { get; set; } [MaxLength(100)] [RegularExpression(@"^[a-zA-Z''-'\s]{1,40}$")] public string
with ash as (select /*+ materialize*/* from DBA_HIST_ACTIVE_SESS_HISTORY where sample_time between timestamp '2015-03-18 15:00:00' and timestamp '2015-03-18 15:01:00'), chains as ( select session_id, level lvl, sys_connect_by_path