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Use SQL to automatically back up the database, generating it in the D:\BAK\ directory. The generated filename is MyDb_20090615 full backup.BAK .

Now I want to compress the database, and delete the original file.

The problem is that the automatically backed-up database name changes every day. Today it is MyDb_20090615 full backup.BAK, tomorrow it will be MyDb_20090616 full backup.BAK.

How can I make RAR identify it automatically, and then compress that database?

cmd /c "C:\Program Files\WinRAR\WinRAR.exe" m -ag -cfg- -ibck -inul -m5 -s -y "D:\BAK\MyDb_" "D:\BAK\MyDb_%date:~0,4%%date:~5,2%%date:~8,2%完全备份.BAK"

If you think the command above is too long, you can use a batch file:

@echo off
set han=D:\BAK\MyDb_%date:~0,4%%date:~5,2%%date:~8,2%
"C:\Program Files\WinRAR\WinRAR.exe" m -afrar -cfg- -ibck -inul -m5 -or -s -y %han% %han%完全备份.BAK
pause&exit


Explanation:
Example of the %date% variable: 2009-06-17 Wednesday


Explanation of WinRAR command switches:
Command M - move files and folders to the archive (that is, delete the original source/target files after compressing)
Switch -AG - generate the archive filename using the current date and time
Switch -AF<type> - specify the archive format
Switch -CFG- - ignore default settings and environment variables
Switch -DR - clear files after archiving. Before deleting the files, overwrite the file data with 0 bytes to prevent the files from being recovered.
Switch -IBCK - run WinRAR in the background
Switch -INUL - disable error messages
Switch -IOFF - shut down PC power
Switch -M<n> - set compression method
Switch -OR - automatically rename extracted files if a file with the same name already exists.
Switch -S - create solid archive
Switch -Y - assume the answer to all prompts is “yes”
Switch -TA<date> - only process files modified after the specified date
Switch -TB<date> - process files modified before the specified date
Switch -TN<time> - process files newer than the specified time
Switch -TO<time> - process files older than the specified time


OP, pay attention to post format and the topic title, so that after I reply it doesn't always get deleted. . .

[ Last edited by Hanyeguxing on 2009-6-17 at 02:39 ]

Thanks, the test succeeded! But there's still another problem: I want to transfer the newest backed-up file to another machine for offsite backup. How can I do that? Automatically... There are several backed-up databases in this directory, so how can it tell which one is the newest?

[ Last edited by zmrmyll on 2009-6-17 at 23:25 ]

Using the batch file above as an example, the generated backup archive name is D:\BAK\MyDb_20090617.rar, and that should be the newest one. If multiple backup archives are made in one day, then you can use:

@echo off

set han=D:\BAK\MyDb_%date:~0,4%%date:~5,2%%date:~8,2%

"C:\Program Files\WinRAR\WinRAR.exe" m -afrar -cfg- -ibck -inul -m5 -or -s -y %han% %han%完全备份.BAK

for /f "delims=" %%i in ('dir "D:\BAK\MyDb_*.rar" /b /s /od /a-d') do set ye=%%i

set gu0=hanyeguxing\

set gu1=UC30194447

set gu2=UC34886634

set xing=Computer

net use \\%xing%\ipc$ "%gu2%" /user:"%gu1%" >nul 2>nul

copy "%ye%" "\\%xing%\F$\%gu0%" /v /y /z

net use \\%xing%\ipc$ /del >nul 2>nul

pause&exit



::Explanation: this batch file is only for LAN file transfer

::Variable gu0 is the path to transfer to; here it is set as F:\hanyeguxing\ on the remote computer

::Variable gu1 is the username for the IPC$ connection

::Variable gu2 is the password for the IPC$ connection user

::Variable xing specifies the name or IP address of the remote computer.

[ Last edited by Hanyeguxing on 2009-6-18 at 13:18 ]