zoukankan      html  css  js  c++  java
  • sql用的求每组中最大和联合

    select  e.txt_desig,
              e.routelevel,
              d.c,
             d.en_route_rte_id,
             t.code_startpointid,
             t.code_startfir,
             t.code_type_start,
             t.code_endpointid,
             t.code_endfir,
             t.code_type_endpoint,
             d.code_dir
        from en_route_rte e,segment t,
       
             (select g.en_route_rte_id, m.c, code_dir,g.segment_id
                from rte_seg g,
                     (select EN_ROUTE_RTE_ID, max(code_sort) as c
                        from rte_seg
                       group by EN_ROUTE_RTE_ID
                       order by EN_ROUTE_RTE_ID) m
               where m.en_route_rte_id = g.en_route_rte_id
                 and m.c = g.code_sort
                      union select en_route_rte_id,code_sort,code_dir,segment_id from rte_seg where code_sort=1) d
        where e.en_route_rte_id = d.en_route_rte_id
        and t.segment_id=d.segment_id
    order by d.en_route_rte_id,d.c

  • 相关阅读:
    【Loj146】DFS序3-树链剖分
    【BZOJ3083】遥远的国度- 树剖-换根
    树链剖分-树剖换根
    c++ 随机生成树
    【HAOI2015】树上操作-树链剖分
    centos修改dns
    HttpClient
    aiax跨域问题
    伪静态
    springboot父子项目
  • 原文地址:https://www.cnblogs.com/weihongli/p/2973413.html
Copyright © 2011-2022 走看看