Oracle樹形查詢 start with connect by

來源:互聯網
上載者:User

Oracle樹形查詢 start with connect by

一、簡介
  在Oracle中start with connect by (prior) 用來對樹形結構的資料進行查詢。其中start with conditon 給出的是資料搜尋範圍, connect by後面給出了遞迴查詢的條件,prior 關鍵字表示父資料,prior 條件表示子資料需要滿足父資料的什麼條件。如下
start with id= '10001' connect by prior parent_id= id and prior num = 5
表示查詢id為10001,並且遞迴查詢parent_id=id,為5的記錄。
二、執行個體
  1、構造資料

 1 -- 表結構 2 

相關文章

A Free Trial That Lets You Build Big!

Start building with 50+ products and up to 12 months usage for Elastic Compute Service

  • Sales Support

    1 on 1 presale consultation

  • After-Sales Support

    24/7 Technical Support 6 Free Tickets per Quarter Faster Response

  • Alibaba Cloud offers highly flexible support services tailored to meet your exact needs.