Flat hierarchyid in SQL Server 2008
ÔÚSQL Server 2008ÖÐÒýÈëÁËhierarchyidÀ´´¦ÀíÊ÷×´½á¹¹¡£ÏÂÃæ¼òµ¥¾ÍÒÔAdventureWorks(ÎÞhierarchyid)ºÍAdventureWorks2008(ÓÐhierarchyid)ÀïµÄHumanResources.EmployeeΪÀý£¬À´ËµÃ÷Ò»ÏÂÔÚеÄhierarchyidÖÐÈçºÎ½øÐÐflat»¯µÄdimension³éÈ¡¡£
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AdventureWorksÖÐËùÒªµÄ½á¹û¼¯´úÂëÈçÏÂ:
select L4.NationalIDNumber, L4.Title, L3.NationalIDNumber, L3.Title, L2.NationalIDNumber, L2.Title, L1.NationalIDNumber, L1.Title, L0.NationalIDNumber, L0.Title
from HumanResources.Employee L4, HumanResources.Employee L3, HumanResources.Employee L2, HumanResources.Employee L1, HumanResources.Employee L0
where L4.ManagerID = L3.EmployeeID and L3.ManagerID = L2.EmployeeID and L2.ManagerID = L1.EmployeeID and L1.ManagerID = L0.EmployeeID
AdventureWorks2008ÖеĴúÂëÈçÏÂ:
select L4.NationalIDNumber, L4.JobTitle, L3.NationalIDNumber, L3.JobTitle, L2.NationalIDNumber, L2.JobTitle, L1.NationalIDNumber, L1.JobTitle, L0.NationalIDNumber, L0.JobTitle
from HumanResources.Employee L0, HumanResources.Employee L1, HumanResources.Employee L2, HumanResources.Employee L3, HumanResources.Employee L4
where L4.OrganizationNode.GetAncestor(1)=L3.OrganizationNode and L3.OrganizationNode.GetAncestor(1)=L2.OrganizationNode and L2.OrganizationNode.GetAncestor(1)=L1.OrganizationNode and L1.OrganizationNode.GetAncestor(1)=L0.OrganizationNode
GetAncestor()ÊÇHierarchyNodeÀàÀïÆäÖеÄÒ»¸ö·½·¨¡£¸ü¶àhierarchyidÊý¾ÝÀàÐÍ·½·¨ÒýÓÿɲο¼ÒÔÏÂÁ´½Ó£º
http://technet.microsoft.com/zh-cn/library/bb677193.aspx
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