三个随机产生密码的存储过程 SQL SERVER

CREATE PROCEDURE [dbo].[usp_RandomPassword]
(
   @Length INT = 8
)
AS
BEGIN  
    DECLARE @RandomPassword NVARCHAR(MAX) = N'',@L INT = 1
    --随机密码将由下面字符串产生，数字0-9,大写字母A-Z,小写字母a-z
    DECLARE @BaseString VARCHAR(255) = '0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz'  
    WHILE @L <= @Length --循环密码长度
    BEGIN
        --61是变量@BaseString的长度减一
        SET @RandomPassword = @RandomPassword + SUBSTRING(@BaseString, CONVERT(INT,ROUND(RAND() * 61 + 1,0)),1)
        SET @L = @L + 1
    END
    SELECT @RandomPassword
END