更改sql 数据库 SA密码 找不到sp_password存储过程

你在master下找不到sp_password存储过程，那把下面的代码在master库运行一下即可：

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

然后在进行运行密码修改命令

以下转帖http://www.0wei.com/thread-25834-1-5.html

 数据库日志ldf损坏的mdf数据库恢复。


有些时候sql数据库不小心被破坏或日志文件丢失的时候请用下列方法恢复数据库。
（速达升级的时候最易出现）
1.新建一个同名的数据库
2.再停掉sql server(注意不要分离数据库)
3.用原数据库的数据文件覆盖掉这个新建的数据库
4.再重启sql server
5.此时打开企业管理器时会出现当前的数据库置疑，先不管，执行下面的语句（注意修改其中的数据库名)
USE master
GO
SP_CONFIGURE 'allow updates',1 RECONFIGURE WITH OVERRIDE
GO
UPDATE SYSDATABASES SET STATUS =32768 WHERE NAME='置疑的数据库名'
GO
SP_DBOPTION '置疑的数据库名', 'single user', 'true'
GO
DBCC CHECKDB('置疑的数据库名') 
GO
UPDATE SYSDATABASES SET STATUS =28 WHERE NAME='置疑的数据库名'
GO
SP_CONFIGURE 'allow updates', 0 RECONFIGURE WITH OVERRIDE
GO
SP_DBOPTION '置疑的数据库名', 'single user', 'false'
GO
现在数据可以挂上，但日志文件没办法连接，插入和删除等修改动作无法完成。
现在重建一个日志文件，看下面代码
USE MASTER 
GO 
SP_CONFIGURE 'ALLOW UPDATES',1 RECONFIGURE WITH OVERRIDE 
GO 
UPDATE SYSDATABASES SET STATUS =32768 WHERE NAME='数据库名' 
Go 
sp_dboption '数据库名', 'single user', 'true' 
GO
dbcc rebuild_log('数据库名','d:\Program Files\Microsoft SQL Server\MSSQL\Data\数据库名_log.ldf')　注意：ldf应和mdf路径一致
Go 
DBCC CHECKDB('数据库名') 
Go 
update sysdatabases set status =28 where name='数据库名'
Go 
sp_configure 'allow updates', 0 reconfigure with override 
Go 
sp_dboption '数据库名', 'single user', 'false' 
Go