SQLSERVER 数据库备份脚本-支持多库备份

<pre name="code" class="sql">--变量定义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 CURSORFOR    SELECT  name    FROM    [sys].[databases]    WHERE   LOWER(name) IN ( 'db1', 'db2' )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_nameOPEN 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  @backupfileSET @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    ENDCLOSE tmp_Cur;DEALLOCATE tmp_Cur;-- 删除3天前的备份文件DECLARE @olddate DATETIMESELECT  @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