SqlServer批量备份多个数据库且删除3天前的备份

废话不多说了，直接给大家贴代码了，具体代码如下所示：

/******************************************* 
 * 批量备份数据库且删除3天前的备份 
 *******************************************/ 
declare @backupfile varchar(1024)  
declare @backdesc varchar(1024)  
declare @filename varchar(1024)  
declare @path varchar(1024)  
declare @dbname varchar(1024)  
declare @extension_name varchar(16)  
--备份参数  
declare tmp_cur cursor  
for  
  select name  
  from  [sys].[databases]  
  where  name not in ( 'master', 'model','msdb','tempdb' )  
set @path = n'd:\backup\autoback\';  
set @extension_name = n'bak';  
--生成文件名  
set @filename = convert(varchar(1024), getdate(), 120)  
set @filename = replace(@filename, ':', '')  
set @filename = replace(@filename, '-', '')  
set @filename = replace(@filename, ' ', '')  
set @filename = @filename + '_' + convert (varchar(3), datepart(ms, getdate()))  
  + n'.' + @extension_name  
open tmp_cur;  
fetch next from tmp_cur into @dbname;  
while @@fetch_status = 0   
  begin  
    -- 得到完整目标文件，数据库将备份到这个文件中  
    set @backupfile = @path + @dbname + @filename  
    --select @backupfile  
    set @backdesc =@dbname + n'-完整 数据库 备份'  
    -- 开始备份, compression 参数表示压缩，可节省磁盘空间  
    backup database @dbname to disk = @backupfile with noformat, noinit, name = @backdesc, skip, norewind, nounload, stats = 10, compression  
    fetch next from tmp_cur into @dbname  
  end  
close tmp_cur;  
deallocate tmp_cur;  
-- 删除3天前的备份文件  
declare @olddate datetime  
select @olddate = dateadd(d, -3, getdate())  
-- 执行删除 (sql 2008 具备)  
execute master.dbo.xp_delete_file 0, @path, @extension_name, @olddate, 1 
[sql] view plain copy print?
--作业定时压缩脚本支持多库 
declare @databasename nvarchar(50) 
declare @executesql nvarchar(max) 
set @executesql='' 
declare name_cursor cursor 
for 
  select name from master..sysdatabases where name not in ( 'master', 'model', 'msdb', 'tempdb',  
  'northwind','pubs','agentsys','ydttimedtask','yidiantongv2' )  
open name_cursor;  
fetch next from name_cursor into @databasename;  
while @@fetch_status = 0 
  begin   
    set @executesql ='' 
    set @executesql +=' 
      use ['+@databasename+']; 
      declare @error int 
      set @error=(select top 1 size/128.0 - cast(fileproperty([name], ''spaceused'') as int)/128.0 as availablespaceinmb from sys.database_files order by [name] desc) 
      --print @error 
      if(@error>1) 
        begin 
          alter database ['+@databasename+']　　--数据库名字 
          set recovery simple;　　--设置简单恢复模式 
          dbcc shrinkfile ([yidiantongv2], 1);　　--(m)不能小于1m, 
          dbcc shrinkfile ([yidiantongv2_log], 1);　　--(m)不能小于1m 
          alter database ['+@databasename+'] 
          set recovery full;　　--恢复为原来完整模式 
        end 
    ' 
    print @executesql; --打印 
    exec(@executesql) --执行 
    fetch next from name_cursor into @databasename;  
  end;  
close name_cursor;  
deallocate name_cursor; 

总结

以上所述是小编给大家介绍的sqlserver批量备份多个数据库且删除3天前的备份，希望对大家有所帮助