DECLARE @bak_path nvarchar(4000)='E:\MsBackUp\SqlAutoBackup\'       --备份路径;
DECLARE @baktype int = 0               --备份类型为全备,1为差异备,2为日志备份
DECLARE @type int = 3                  --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;
DECLARE @dbnames nvarchar(4000)='DB_ERP_JD,DB_WMS_JD,DB_FMS_JD,TEST_ERP_JD,TEST_WMS_JD,TEST_FMS_JD'        --需要备份或排除的数据库，用,隔开，当@type=3或4时生效
DECLARE @overdueDay int = 0           --设置过期天数，默认天;
DECLARE @compression int =0               --是否采用sql2008的压缩备份,0为否,1为采用压缩--sql server 2005/2008备份/删除过期备份T-sql 版本v1.0
/*
desc  :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', 1
reconfigure with override
exec sp_configure 'xp_cmdshell', 1
reconfigure with override
exec sp_configure 'show advanced options', 0
reconfigure with override
print char(13)+'------------------------'--判断是否填写路径
if isnull(@bak_path,'')=''beginprint('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),'')=''beginprint('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 end
elsebeginif @baktype not between 0 and 2beginprint('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 endend
--判断是否指定需要备份的库
if isnull(ltrim(@type),'')=''beginprint('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
elsebeginif @type not between 0 and 4beginprint('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 endend--判断指定库或排除库时，是否填写库名
if @type>2if @dbnames=''beginprint('error:备份类型为'+ltrim(@type)+'时，需要指定@dbnames参数')return end--判断指定指定过期时间
if isnull(ltrim(@overdueDay),'')=''
beginprint('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)=0beginprint('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))beginprint('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 @bak_path=@bak_path+''
if isnull(@dbnames,'')!='' set @dbnames = ','+@dbnames+','
set @dbnames=replace(@dbnames,' ','')--定义变量
declare @bak_sql nvarchar(max),@del_sql nvarchar(max),@i int,@maxid int
declare @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--------------------start
declare @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+'','','''+@dbnames+''')>0'when 4 then 'and charindex('',''+Name+'','','''+@dbnames+''')=0 and database_id>4'else '1>2' end
insert into @t exec(@sql)
--获取需要备份的库名---------------------end--获取需要创建的文件夹------------------start
insert into @dirtree_1 exec('master.dbo.xp_dirtree '''+@bak_path+''',0,1')
select @createfolder=isnull(@createfolder,'')+'exec master.dbo.xp_cmdshell ''md '+@bak_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-------------start
if @overdueDay>0
begininsert into @dirtree_2(subdirectory,depth,files) exec('master.dbo.xp_dirtree '''+@bak_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=2delete 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) )=0if 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 adelete @dirtree_2 from @dirtree_2 as a left join @t as b on b.name=a.dbname where b.id is nullupdate @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 aselect @delbak=isnull(@delbak,'')+'exec master.dbo.xp_cmdshell ''del '+@bak_path+''+dbname+''+subdirectory+''',no_output '+char(13) from @dirtree_2 where isLastbak=0 and datediff(day,baktime,getdate())>@overdueDay
end
--生成处理过期备份的sql语句--------------endbegin tryprint(@createfolder)  --创建备份所需文件夹exec(@createfolder)   --创建备份所需文件夹
end try
begin catchprint 'err:'+ltrim(error_number())print 'err:'+error_message()return
end catchselect @i=1 ,@maxid=max(id) from @t
while @i<=@maxid
beginselect @bak_sql=''+char(13)+'backup '+ case when @baktype=2 then 'log ' else 'database ' end+quotename(Name)+' to disk='''+@bak_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 id=@iset @i=@i+1begin tryprint(@bak_sql)--循环执行备份exec(@bak_sql) --循环执行备份end trybegin catchprint 'err:'+ltrim(error_number())print 'err:'+error_message()end catch
endbegin tryprint(@delbak)   --删除超期的备份exec(@delbak)    --删除超期的备份
end try
begin catchprint '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', 1
reconfigure with override
exec sp_configure 'show advanced options', 0
reconfigure with override