Grant Fritchey (1/4/2010)

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sudhakara (1/4/2010)

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Jack Corbett (1/4/2010)

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Sorry to say that you are basically screwed since you have no backups. Your only option is to run DBCC CHECKDB or CHECKTABLE with one of the repair options, probably REPAIR_ALLOW_DATA_LOSS which does exactly what you it says, it fixes the corruption, but you will most likely lose data. Check out Paul Randal's blog[/url] and look at the CHECKDB and Corruption tags.

After attaching the user databases in the server, i will apply the some data patches and fixes application related, after completing this process only i will take the backup of the database.But unfortunately after completing this data patches and fixes database got corrupted.

Take a backup before, take a backup after, heck, depending on how extensive the number of changes you're performing, take a backup in the middle. If you're mucking with production data, it's difficult to be overly paranoid.