zoukankan      html  css  js  c++  java
  • 一种使用connect by level转集合的SQL 语句。

    /* Formatted on 12/24/2010 2:02:41 PM (QP5 v5.163.1008.3004) */
    SELECT       TO_CHAR (SUBSTR (c,
                                  INSTR (c,
                                         ',',
                                         1,
                                         LEVEL)
                                  + 1,
                                    INSTR (c,
                                           ',',
                                           1,
                                           LEVEL + 1)
                                  - INSTR (c,
                                           ',',
                                           1,
                                           LEVEL)
                                  - 1)) dayofweek
          FROM   (SELECT ',' || 'MON,TUE,WED' || ',' c FROM DUAL)
    CONNECT BY   LEVEL < LENGTH (c) - LENGTH (REPLACE (c, ','))

    魔兽就是毒瘤,大家千万不要玩。
  • 相关阅读:
    整理之刷过的数据结构与算法题
    EM 算法求解高斯混合模型python实现
    C语言实现二叉树的基本操作
    scala 小结(一)
    Eclipse 配置运行Spark
    js替换字符串
    安装uni-ui
    判断当前时间的 时分 是否在一个时间段内
    vue 定时器实时刷新数据

  • 原文地址:https://www.cnblogs.com/tracy/p/1915958.html
Copyright © 2011-2022 走看看