sql server数据备份-

--http://blog.csdn.net/sinpoal/archive/2009/11/09/4790995.aspx--推荐看一下
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ms-help://MS.SQLCC.v9/MS.SQLSVR.v9.zh-CHS/udb9/html/faf37e0c-612d-4943-b13c-ec88a1408ffa.htm
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http://www.orsoon.com/Article/Article_21364.html
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SQL code
-- 给你一个备份的存储过程（适用于SQL Server 2005 和 SQL Server 2008)-- (你只需要在master数据库中创建此存储过程，然后写个执行计划，调用此存储过程即可）USE [master]GO/****** 对象:  StoredProcedure [dbo].[sp_backupdatabase]    脚本日期: 07/15/2009 16:23:56 ******/SET ANSI_NULLS ONGOSET QUOTED_IDENTIFIER ONGOCREATE proc [dbo].[sp_backupdatabase] @bak_path nvarchar(4000)='',       --备份路径; @baktype int = null,               --备份类型0为全备,1为差异备,2为日志备份 @type int = null,                  --设置需要备份的库,0为全部库,1为系统库,2为全部用户库,3为指定库,4为排除指定库; @dbnames nvarchar(4000)='',        --需要备份或排除的数据库，用,隔开，[email protected]=3或4时生效 @overdueDay int = null,            --设置过期天数，默认天; @compression int =0                --是否采用sql2008的压缩备份,0为否,1为采用压缩as--sql server 2005/2008备份/删除过期备份T-sql 版本v1.0/*author:perfectactiondate  :2009.04desc  :适用于sql2005/2008备份，自动生成库文件夹，可以自定义备份类型和备份库名等      可以自定义备份过期的天数              删除过期备份功能不会删除最后一次备份，哪怕已经过期              如果某库不再备份，那么也不会再删除之前过期的备份        如有错误请指正，谢谢.*/set nocount on--开启xp_cmdshell支持exec sp_configure 'show advanced options', 1reconfigure with overrideexec sp_configure 'xp_cmdshell', 1 reconfigure with overrideexec sp_configure 'show advanced options', 0reconfigure with overrideprint char(13)+'------------------------'--判断是否填写路径if isnull(@bak_path,'')=''    begin        print('error:请指定备份路径')        return     end--判断是否指定需要备份的库if isnull(ltrim(@baktype),'')=''    begin        print('error:请指定备份类型aa:0为全备,1为差异备,2为日志备份')        return     endelse    begin        if @baktype not between 0 and 2        begin            print('error:指定备份类型只能为,1,2:  0为全备,1为差异备,2为日志备份')            return         end    end--判断是否指定需要备份的库if isnull(ltrim(@type),'')=''    begin        print('error:请指定需要备份的库,0为全部库,1为系统库,2为全部用户库,3为指定库,4为排除指定库')        return     endelse    begin        if @type not between 0 and 4        begin            print('error:请指定需要备份的库,0为全部库,1为系统库,2为全部用户库,3为指定库,4为排除指定库')            return         end    end--判断指定库或排除库时，是否填写库名if @type>2    if @dbnames=''    begin        print('error:备份类型为'+ltrim(@type)+'时，[email protected]')        return     end--判断指定指定过期时间if isnull(ltrim(@overdueDay),'')=''begin    print('error:必须指定备份过期时间,单位为天,0为永不过期')    return end--判断是否支持压缩if @compression=1     if charindex('2008',@@version)=0 or charindex('Enterprise',@@version)=0    begin        print('error:压缩备份只支持sql2008企业版')        return     end--判断是否存在该磁盘declare @drives table(drive varchar(1),[size] varchar(20))insert into @drives exec('master.dbo.xp_fixeddrives')if not exists(select 1 from @drives where drive=left(@bak_path,1))    begin        print('error:不存在该磁盘:'+left(@bak_path,1))        return     end--格式化参数select @bak_path=rtrim(ltrim(@bak_path)),@dbnames=rtrim(ltrim(@dbnames))if right(isnull(@bak_path,''),1)!='\' set @[email protected]_path+'\'if isnull(@dbnames,'')!='' set @dbnames = ',[email protected]+','set @dbnames=replace(@dbnames,' ','')--定义变量declare @bak_sql nvarchar(max),@del_sql nvarchar(max),@i int,@maxid intdeclare @dirtree_1 table (id int identity(1,1) primary key,subdirectory nvarchar(600),depth int,files int)declare @dirtree_2 table (id int identity(1,1) primary key,subdirectory nvarchar(600),depth int,files int,dbname varchar(300),baktime datetime,isLastbak int)declare @createfolder nvarchar(max),@delbackupfile nvarchar(max),@delbak nvarchar(max)--获取需要备份的库名--------------------startdeclare @t table(id int identity(1,1) primary key,name nvarchar(max))declare @sql nvarchar(max)set @sql = 'select name from sys.databases where state=0 and name!=''tempdb''  '    + case when @baktype=2 then ' and recovery_model!=3 ' else '' end    + case @type when 0 then 'and 1=1'        when 1 then 'and database_id<=4'        when 2 then 'and database_id>4'        when 3 then 'and charindex('',''+Name+'','',[email protected]+''')>0'        when 4 then 'and charindex('',''+Name+'','',[email protected]+''')=0 and database_id>4'        else '1>2' endinsert into @t exec(@sql)--获取需要备份的库名---------------------end--获取需要创建的文件夹------------------startinsert into @dirtree_1 exec('master.dbo.xp_dirtree [email protected]_path+''',0,1')select @createfolder=isnull(@createfolder,'')+'exec master.dbo.xp_cmdshell ''md [email protected]_path+''+name+''',no_output '+char(13)from @t as a left join @dirtree_1 as b on a.name=b.subdirectory and b.files=0 and depth=1 where  b.id is null--获取需要创建的文件夹-------------------end--生成处理过期备份的sql语句-------------startif @overdueDay>0begin    insert into @dirtree_2(subdirectory,depth,files) exec('master.dbo.xp_dirtree [email protected]_path+''',0,1')    if @baktype =0     delete from @dirtree_2 where depth=1 or files=0 or charindex('_Full_bak_',subdirectory)=0     if @baktype =1     delete from @dirtree_2 where depth=1 or files=0 or charindex('_Diff_bak_',subdirectory)=0     if @baktype=2    delete from @dirtree_2 where depth=1 or files=0 or charindex('_Log_bak_',subdirectory)=0     if exists(select 1 from @dirtree_2)    delete from @dirtree_2 where isdate(            left(right(subdirectory,19),8)+' '+ substring(right(subdirectory,20),11,2) + ':' +              substring(right(subdirectory,20),13,2) +':'+substring(right(subdirectory,20),15,2)             )=0    if exists(select 1 from @dirtree_2)    update @dirtree_2 set dbname = case when @baktype=0 then left(subdirectory,charindex('_Full_bak_',subdirectory)-1)        when @baktype=1 then left(subdirectory,charindex('_Diff_bak_',subdirectory)-1)         when @baktype=2 then left(subdirectory,charindex('_Log_bak_',subdirectory)-1)         else '' end            ,baktime=left(right(subdirectory,19),8)+' '+ substring(right(subdirectory,20),11,2) + ':' +              substring(right(subdirectory,20),13,2) +':'+substring(right(subdirectory,20),15,2)     from @dirtree_2 as a    delete @dirtree_2 from @dirtree_2 as a left join @t as b on b.name=a.dbname where b.id is null    update @dirtree_2 set isLastbak= case when (select max(baktime) from @dirtree_2 where dbname=a.dbname)=baktime     then 1 else 0 end from @dirtree_2 as a    select @delbak=isnull(@delbak,'')+'exec master.dbo.xp_cmdshell ''del [email protected]_path+''+dbname+'\'    +subdirectory+''',no_output '+char(13) from @dirtree_2 where isLastbak=0 and datediff(day,baktime,getdate())>@overdueDayend--生成处理过期备份的sql语句--------------endbegin try    print(@createfolder)  --创建备份所需文件夹    exec(@createfolder)   --创建备份所需文件夹end trybegin catch    print 'err:'+ltrim(error_number())    print 'err:'+error_message()    returnend catchselect @i=1 ,@maxid=max(id) from @twhile @i<[email protected]begin    select @bak_sql=''+char(13)+'backup '+ case when @baktype=2 then 'log ' else 'database ' end            +quotename(Name)+' to [email protected]_path + Name+'\'+            Name+ case when @baktype=0 then '_Full_bak_' when @baktype=1 then '_Diff_bak_'             when @baktype=2 then '_Log_bak_' else null end + case when @compression=1 then 'compression_' else '' end+            replace(replace(replace(convert(varchar(20),getdate(),120),'-',''),' ','_'),':','')+            case when @baktype=2 then '.trn' when @baktype=1 then '.dif' else '.bak' end +''''             + case when @compression=1 or @baktype=1 then ' with ' else '' end            + case when @compression=1 then 'compression,' else '' end            + case when @baktype=1 then 'differential,' else '' end            + case when @compression=1 or @baktype=1 then ' noformat' else '' end     from @t where [email protected]    set @[email protected]+1    begin try        print(@bak_sql)--循环执行备份        exec(@bak_sql) --循环执行备份    end try    begin catch        print 'err:'+ltrim(error_number())        print 'err:'+error_message()    end catchendbegin try    print(@delbak)   --删除超期的备份    exec(@delbak)    --删除超期的备份end trybegin catch    print 'err:'+ltrim(error_number())    print 'err:'+error_message()end catch--关闭xp_cmdshell支持--exec sp_configure 'show advanced options', 1--reconfigure with override--exec sp_configure 'xp_cmdshell', 0 --reconfigure with override--exec sp_configure 'show advanced options', 0--reconfigure with override