zoukankan      html  css  js  c++  java
  • sql with 的妙用

    with aa(a,b,c)as
    (
    select PROJECT_ID,PROJECT_NAME,PARENT_PROJECT_ID from T_PROJECT --where PARENT_PROJECT_ID is not null
    ),mm(PROJECT_ID,PROJECT_NAME,PARENT_PROJECT_ID,PARENT_PROJECT_NAME) as
    (
    select distinct aa.a,aa.b,aa.c,p.PROJECT_NAME from aa
    left join T_PROJECT p on aa.c = p.PROJECT_ID
    )
    select * from mm

    ;
    with aa(a,b,c)as
    (
    select PROJECT_ID,PROJECT_NAME,PARENT_PROJECT_ID from T_PROJECT where PARENT_PROJECT_ID is not null
    union all
    select p.PROJECT_ID,p.PROJECT_NAME,p.PARENT_PROJECT_ID from T_PROJECT p ,aa where p.PROJECT_ID = aa.c
    )
    select distinct * from aa
  • 相关阅读:
    厂商前缀
    文本阴影和边框阴影
    2D转换
    overflow属性
    margin属性
    CSS圆角边框
    浮动定位
    文档流定位
    position属性
    选择器二
  • 原文地址:https://www.cnblogs.com/shikyoh/p/2119710.html
Copyright © 2011-2022 走看看