大马资讯论坛 - 马来西亚中文资讯平台

标题: [教学]SQL Server从父节点取出所有的子节点，select all child node [打印本页]
作者: 资讯王    时间: 2012-7-4 20:11
标题: [教学]SQL Server从父节点取出所有的子节点，select all child node
[教学]SQL Server从父节点取出所有的子节点，select all child node from parent node
  1. DECLARE @ItemCategory TABLE
  2. (
  3.     ChildId INT NOT NULL,
  4.     Name varchar(50) NOT NULL,
  5.     ParentId int NULL
  6. )

  8. INSERT INTO @ItemCategory SELECT 1, 'Toys', null
  9. INSERT INTO @ItemCategory SELECT 2, 'Computers', null
  10. INSERT INTO @ItemCategory SELECT 3, 'Consoles', 2
  11. INSERT INTO @ItemCategory SELECT 4, 'PlayStation 3', 3
  12. INSERT INTO @ItemCategory SELECT 5, 'Xbox 360', 2
  13. INSERT INTO @ItemCategory SELECT 6, 'Games', 1
  14. INSERT INTO @ItemCategory SELECT 7, 'Puzzles', 6
  15. INSERT INTO @ItemCategory SELECT 8, 'Mens Wear', null
  16. INSERT INTO @ItemCategory SELECT 9, 'Mens Clothing', 8
  17. INSERT INTO @ItemCategory SELECT 10, 'Jackets', 9
  18. INSERT INTO @ItemCategory SELECT 11, 'Rain Coats', 10

  20. DECLARE @ParentId INT = 1

  22. ;
  23. with cte as (
  24.         select * from @ItemCategory where ParentId = @ParentId
  25.         union all
  26.         select T.*
  27.         from @ItemCategory T
  28.         inner join cte  on cte.ChildId = T.ParentId
  29. )
  30. select *  from cte
复制代码




欢迎光临 大马资讯论坛 - 马来西亚中文资讯平台 (http://freeinfo.com.my/) Powered by Discuz! X3.3