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.MDF File Sizes

Posted on 2004-04-15
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Last Modified: 2012-05-04
I have a database that was roughly 230 GB large.  I deleted all tables in the database and the .mdf file was still 230 GB large.  Does the delete from table, truncate from table, and/or the drop table commands not physically remove the data from the .mdf file?  I ended up detaching the database and deleting it to regain the space but I am concerned over the implications that this could have on other databases that I have.  Any advise would be appreciated.
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Question by:xKilent
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Arthur_Wood earned 125 total points
ID: 10834112
what you need to do is to SHRINK the database.  This is the SQL Server equivalent of COMPACTing an Access MDB.  What is happeing is this.  As data is added to your Tables, they grow, and the MDF grows.  When you delete data, or Tables, the MDF does NOT automatically reduce in size (aftrer all, you may wnat to add more data, and the space is already trhere, to accomdate that).

In Enterprise Manager, open the Databases Tab, then right click on the Database entry, then choose Shrink Database...

AW
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by:debi_mela
ID: 10835228
"I ended up detaching the database and deleting it to regain the space but I am concerned over the implications that this could have on other databases that I have.  Any advise would be appreciated. "

Does this mean that you don't need this database anymore.  If so, you can detach and delete this .MDF and corresponding .LDF file, it will not affect other databases.
  If not, as suggested earlier you need to  shrink the database and truncate empty space.

-Deb.
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Expert Comment

by:Lowfatspread
ID: 10838465
was it just your MDF that was big , what size was your log file?

you need to consider scheduling regular shrink / optimisation jobs on databases of this size...

what version and edition of SQL server..?



PS there is a separate topic area for SQL SERVER related questions
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