三种随便密码生成sql存储过程

随机产生密码，Insus.NET总结了三个，并分别写成了存储过程。

第一个，

代码如下

复制代码

usp_RandomPassword CREATE PROCEDURE [dbo].[usp_RandomPassword]
(
@Length INT = 8
)
AS
BEGIN
DECLARE @RandomPassword NVARCHAR(MAX) = N'',@L INT = 1
WHILE @L <= @Length --循环密码长度
BEGIN
--随机产生每一位字符，ASCII码48至122
DECLARE @RndChar CHAR(1) = CHAR(ROUND(RAND() * (122-48+1) + 48,0))
--随机产生的字符不包括下面字符
IF ASCII(@RndChar) NOT IN(58,59,60,61,62,63,64,91,92,93,94,95,96) -- : , ; , < , = , > , ? ,@ , [ , , ] , ^ , _ , `
BEGIN
SET @RandomPassword = @RandomPassword + @RndChar
SET @L = @L + 1
END
END
SELECT @RandomPassword
END

第二个，

代码如下

复制代码

usp_RandomPassword 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

第三个，

代码如下

复制代码

usp_RandomPassword CREATE PROCEDURE [dbo].[usp_RandomPassword]
(
@Length INT = 8
)
AS
BEGIN
DECLARE @RandomPassword NVARCHAR(MAX) = N''
DECLARE @R TINYINT,@L INT = 1
WHILE @L <= @Length --循环密码长度
BEGIN
SET @R = ROUND(RAND() * 2, 0) --随机产生0,1,2整数
IF @R = 0 --当变量为0时，将随机产生一位数字
SET @RandomPassword = @RandomPassword + CHAR(ROUND(RAND() * 9 + 48,0))
ELSE IF @R = 1 --当变量为1时，将随机产生一位大写字母
SET @RandomPassword = @RandomPassword + CHAR(ROUND(RAND() * 25 + 65,0))
ELSE IF @R = 2 --当变量为2时，将随机产生一位小写字母
SET @RandomPassword = @RandomPassword + CHAR(ROUND(RAND() * 25 + 97,0))
SET @L = @L + 1
END
SELECT @RandomPassword
END

最后一个也可以重构写成：

代码如下

复制代码

usp_RandomPassword CREATE PROCEDURE [dbo].[usp_RandomPassword]
(
@Length INT = 8
)
AS
BEGIN
DECLARE @RandomPassword NVARCHAR(MAX) = N'',@L INT = 1
WHILE @L <= @Length --循环密码长度
BEGIN
DECLARE @R INT = ROUND(RAND() * 2, 0)
SET @RandomPassword = @RandomPassword + CASE @R
WHEN 0 THEN CHAR(ROUND(RAND() * 9 + 48,0))
WHEN 1 THEN CHAR(ROUND(RAND() * 25 + 65,0))
WHEN 2 THEN CHAR(ROUND(RAND() * 25 + 97,0)) END
SET @L = @L + 1
END
SELECT @RandomPassword
END

Also reference:

补充：数据库,Mssql