递归查询SQL语句

USE [DB]
GO

/****** Object:  View [dbo].[v_menus]    Script Date: 02/24/2014 15:55:45 ******/
SET ANSI_NULLS ON
GO

SET QUOTED_IDENTIFIER ON
GO

ALTER VIEW [dbo].[v_menus]
AS
WITH StepCTE
AS
(
SELECT
  guid,
  NodeCode,
  ParentNode,
  name,
  url,
  lcon,
  akState,
  aktype,
  num,
  1 as Lev,
  ROW_NUMBER() OVER(ORDER BY (SELECT 1))  * 1000000 AS [seq]
FROM
  ak_menus
WHERE
  ParentNode='' ----or  ParentNode is null
UNION ALL
SELECT
  T.guid,
  T.NodeCode,
  T.ParentNode,
  T.name,
  T.url,
  T.lcon,
  T.akState,
  T.aktype,
  T.num,
  CTE.Lev + 1,
  case 
    when CTE.[Lev] = 1 then CTE.[seq] + ROW_NUMBER() OVER(ORDER BY (SELECT 1)) * 10000
    --when CTE.[Lev] = 2 then CTE.[seq] + ROW_NUMBER() OVER(ORDER BY (SELECT 1)) * 100
    --when CTE.[Lev] = 3 then CTE.[seq] + ROW_NUMBER() OVER(ORDER BY (SELECT 1)) 
    else CTE.[seq] + ROW_NUMBER() OVER(ORDER BY (SELECT 1))
  end as [seq]
FROM
  ak_menus T INNER JOIN StepCTE CTE
  ON T.ParentNode = CTE.NodeCode
)


SELECT
  guid, name,url,lcon,NodeCode,akState,aktype,num, Lev ,[seq]
FROM 
  StepCTE 

GO