sql server生成递归日期

WITH    Date
          AS ( SELECT   CAST('2008-08-01' AS DATETIME) da
               UNION ALL
               SELECT   da + 1
               FROM     Date
               WHERE    da < '2008-08-21'
             )
    SELECT  CONVERT(VARCHAR, da, 23) AS c
    FROM    Date
    ORDER BY da

WITH Temp
AS (
	SELECT 1 [index],	REPLACE(NEWID(), '-', '') as guid

	UNION ALL

	SELECT [index] + 1,	REPLACE(NEWID(), '-', '') as guid
	FROM Temp
	WHERE [index] < 20
)
SELECT [index],guid
FROM Temp
ORDER BY [index]