TSQL 不用遊標的循環方法

方法一：

SELECT * INTO #t1 FROM dbo.HorseBase

DECLARE @id int
DECLARE @t2 table (id int)

WHILE (exists(SELECT HorseNumber FROM #t1))
BEGIN
SELECT TOP 1 @id=HorseNumber FROM #t1
INSERT INTO @t2 SELECT HorseNumber FROM #t1 WHERE HorseNumber=@id
DELETE FROM #t1 WHERE HorseNumber=@id
END

DROP Table #t1

方法二：

DECLARE @r int
DECLARE @number int;
DECLARE @t2 table ( [name] nvarchar(200))

SELECT ROW_NUMBER() OVER (ORDER BY [Name] ) AS number,[name] INTO #nn1 FROM dbo.tbl_Entity
SELECT @number=MAX(number) FROM #nn1
SET @r=1
WHILE (@r<=@number)
BEGIN
INSERT INTO @t2 SELECT [name] FROM #nn1 WHERE number=@r
SET @r=@r+1
END

DROP TABLE #nn1
 

ROW_NUMBER() 在分頁存儲過程中也是很好用的