修改SA密码，提示错误2812，未能找到存储过程'sp_password'

修改SA密码，提示错误2812，未能找到存储过程'sp_password'
解决方法：
在查询分析器里面，选择windows验证，进去，然后执行下面语句，然后再去修改，就OK了。
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