sql sa密码修改方法及sp_password存储过程

修改sa密码

1． 打开企业管理器，依次展开服务器组，然后展开服务器。 2． 打开“安全性”文件夹，单击“登录”，然后用右键单击“Sa”，执行“属性”命令。 3． 弹出“SQL Server登录属性”对话框，在“SQL Server身份验证”密码栏，输入最新密码。 4． 单击“确定”按钮，弹出“确认密码”对话框，再输一遍登录密码。 5． 单击“确定”按钮，完成对Sa登录密码的修改。


另一种方法：
查询分析器用“SQL Server身份验证”登陆
****************************************************************
语法：exec sp_password '旧密码','新密码','sa'
****************************************************************
A.无原密码的情况下更改登录密码
下面的示例将登录 sa 的密码更改为 ok。
EXEC sp_password NULL, 'ok', 'sa'
B.更改密码
下面的示例将登录 sa 的密码由 ok 改为 空。
EXEC sp_password 'ok', null

附上sp_password存储过程，如果提示找不到该存储过程的，执行以下语句即可(master)。


SET QUOTED_IDENTIFIER ON
GO
SET ANSI_NULLS OFF
GO

create procedure sp_password
@old sysname = NULL, -- the old (current) password
@new sysname, -- the new password
@loginame sysname = NULL -- user to change password on
as
-- SETUP RUNTIME OPTIONS / DECLARE VARIABLES --
set nocount on
declare @self int
select @self = CASE WHEN @loginame is null THEN 1 ELSE 2 END

-- RESOLVE LOGIN NAME
if @loginame is null
select @loginame = suser_sname()

-- CHECK PERMISSIONS (SecurityAdmin per Richard Waymire) --
IF (not is_srvrolemember('securityadmin') = 1)
AND not @self = 1
begin
dbcc auditevent (107, @self, 0, @loginame, NULL, NULL, NULL)
raiserror(15210,-1,-1)
return (1)
end
ELSE
begin
dbcc auditevent (107, @self, 1, @loginame, NULL, NULL, NULL)
end

-- DISALLOW USER TRANSACTION --
set implicit_transactions off
IF (@@trancount > 0)
begin
raiserror(15002,-1,-1,'sp_password')
return (1)
end

-- RESOLVE LOGIN NAME (disallows nt names)
if not exists (select * from master.dbo.syslogins where
loginname = @loginame and isntname = 0)
begin
raiserror(15007,-1,-1,@loginame)
return (1)
end

-- IF non-SYSADMIN ATTEMPTING CHANGE TO SYSADMIN, REQUIRE PASSWORD (218078) --
if (@self <> 1 AND is_srvrolemember('sysadmin') = 0 AND exists
(SELECT * FROM master.dbo.syslogins WHERE loginname = @loginame and isntname = 0
AND sysadmin = 1) )
SELECT @self = 1

-- CHECK OLD PASSWORD IF NEEDED --
if (@self = 1 or @old is not null)
if not exists (select * from master.dbo.sysxlogins
where srvid IS NULL and
name = @loginame and
( (@old is null and password is null) or

(pwdcompare(@old, password, (CASE WHEN xstatus&2048 = 2048 THEN 1 ELSE 0 END)) = 1) ) )
begin
raiserror(15211,-1,-1)
return (1)
end

-- CHANGE THE PASSWORD --
update master.dbo.sysxlogins
set password = convert(varbinary(256), pwdencrypt(@new)), xdate2 = getdate(), xstatus = xstatus & (~2048)
where name = @loginame and srvid IS NULL

-- UPDATE PROTECTION TIMESTAMP FOR MASTER DB, TO INDICATE SYSLOGINS CHANGE --
exec('use master grant all to null')

-- FINALIZATION: RETURN SUCCESS/FAILURE --
if @@error <> 0
return (1)
raiserror(15478,-1,-1)
return (0) -- sp_password

GO
SET QUOTED_IDENTIFIER OFF
GO
SET ANSI_NULLS ON
GO