[Irving] SQL 2005/SQL 2008 备份数据库并自动删除N天前备份的脚本

以下为SQL脚本,本人以执行计划来调用,所以改成了执行命令,大家可根据自己需要改为存储过程使用

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,‘‘)=‘‘
    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 
    end
else
    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 
    end
else
    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,需要指定@dbnames参数)
        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 @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
begin
    insert 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=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 +@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--------------end

 


begin try
    print(@createfolder)  --创建备份所需文件夹
    exec(@createfolder)   --创建备份所需文件夹
end try
begin catch
    print err:+ltrim(error_number())
    print err:+error_message()
    return
end catch


select @i=1 ,@maxid=max(id) from @t
while @i<=@maxid
begin
    select @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=@i
    set @i=@i+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 catch
end

begin try
    print(@delbak)   --删除超期的备份
    exec(@delbak)    --删除超期的备份
end try
begin 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, 1 
reconfigure with override
exec sp_configure show advanced options, 0
reconfigure with override

 

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