Question

我有一个名为Department的表格，其中包含3列：DepartmentID，DepartmentName，ParentID。

有关详细信息，请参阅SQL Fiddle

我想按ParentID和Generation订购结果。像这样：
╔═════════╦════════════════╦════════════╦═════════ ═╗
║儿童ID║部门名称║代║亲子ID║
╠═════════╬════════════════╬════════════╬═════════ ═╣
║1║经理║0║NULL║
║6║销售额║1║1║
║7║舰队║1║1║
║4║货物║2║7║
║5║运输║2║7║
║2║IT║2║6║
║3║食物║2║6║
╚═════════╩════════════════╩════════════╩═════════ ═╝

我尝试了不同的ORDER BY但没有效果。

我的存储过程：

WITH Hierarchy(ChildId, DeparmentName, Generation, ParentID)
AS
(
SELECT DepartmentID, DeparmentName, 0, ParentID
    FROM Departments AS FirtGeneration
    WHERE ParentID IS NULL 
UNION ALL
    SELECT NextGeneration.DepartmentID, NextGeneration.DeparmentName, Parent.Generation + 1, Parent.ChildId
        FROM Departments AS NextGeneration
        INNER JOIN Hierarchy AS Parent ON NextGeneration.ParentID = Parent.ChildId    
)
SELECT * FROM Hierarchy
OPTION(MAXRECURSION 32767)

我使用MS SQL Server 2005

Answer 1

尝试将路径存储在分层查询的顶部：

WITH Hierarchy(ChildId, DeparmentName, Generation, ParentID, Path) AS (
      SELECT DepartmentID, DepartmentName, 0, ParentID,
             RIGHT('000' + CAST(DepartmentID as VARCHAR(MAX)), 3) as Path
      FROM Departments FirstGeneration
      WHERE ParentID IS NULL 
      UNION ALL
      SELECT NextGeneration.DepartmentID, NextGeneration.DeparmentName, Parent.Generation + 1, Parent.ChildId,
             Path + '-->' + CAST(RIGHT('000' + CAST(NextGeneration.DepartmentID as VARCHAR(MAX)), 3)
      FROM Departments NextGeneration INNER JOIN
           Hierarchy Parent
           ON NextGeneration.ParentID = Parent.ChildId    
     )
SELECT h.*
FROM Hierarchy h
ORDER BY path
OPTION(MAXRECURSION 32767);

ORDER BY使用MS SQL Server存储过程的子父层次结构

1 个答案: