SQL Server 2005中的递归实现 - Goodspeed

SELECT * INTO t --载入测试数据

FROM

(

SELECT 1 AS ID,\'food\' AS Product,0 AS ParentID UNION ALL

SELECT 2,\'sport\',0 UNION ALL

SELECT 3,\'drink\',1 UNION ALL

SELECT 4,\'ball\',2 UNION ALL

SELECT 5,\'fruit\',1 UNION ALL

SELECT 6,\'apple\',5 UNION ALL

SELECT 7,\'banana\',5 UNION ALL

SELECT 8,\'football\',4 UNION ALL

SELECT 9,\'basketball\',4 UNION ALL

SELECT 10,\'peisi\',3 UNION ALL

SELECT 11,\'wohaha\',3

) AS a

GO

WITH ShowTree(ID,Product,ORDERBY) AS

(

SELECT ID,Product,ID FROM t WHERE ParentID=0 --固定成员

UNION ALL

SELECT t.ID,t.Product,ORDERBY*100+t.ID FROM ShowTree AS s

INNER JOIN t ON s.ID = t.ParentID

)

SELECT * FROM ShowTree ORDER BY CAST(ORDERBY AS VARCHAR(50))--OPTION(MAXRECURSION 1)

DROP TABLE t