--取得隨機數的視圖
CREATE VIEW v_RAND
AS
SELECT re=STUFF(RAND(),1,2,'')
GO

--生成隨機編號的函數
CREATE FUNCTION f_RANDBH(@BHLen int)
RETURNS varchar(50)
AS
BEGIN
?DECLARE @r varchar(50)
?IF NOT(ISNULL(@BHLen,0) BETWEEN 1 AND 50)
??SET @BHLen=10

lb_bh:?--生成隨機編號的處理
?SELECT @r=re FROM v_RAND
?WHILE LEN(@r)<@BHLen
??SELECT @r=@r+re FROM v_RAND
?SET @r=LEFT(@r,@BHLen)

?--檢查編號在基礎數據表中是否存在
?IF EXISTS(SELECT * FROM tb WITH(XLOCK,PAGLOCK) WHERE BH=@r )
??GOTO lb_bh

?RETURN(@r)
END
GO

--創建引用生成隨機編號的函數
CREATE TABLE tb(
BH char(10) PRIMARY KEY DEFAULT dbo.f_RANDBH(10),
col int)

--插放數據
BEGIN TRAN
?INSERT tb(col) VALUES(1)
?INSERT tb(col) VALUES(2)
?INSERT tb(col) VALUES(3)
COMMIT TRAN
SELECT * FROM tb
GO
/*--結果
BH?????????????????? col
------------------------------ -----------
6128177354?????????? 1
7378536177?????????? 3
8387186129?????????? 2
--*/

生成純數字隨機編號的示例.sql