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Many updates in a day


What is the limit of updates per day.

We are building a huge application which will involve many applicants whose details will be updated in the system individually via the web appln  page etc. 
What is the limit on calling update function per day., rather how many times can we call update() function in a day, say 10000, 50000 etc

Kind regards,
there isnt a limit per day on number of updates, but you have a limit per transaction, 

In a transaction you cannot have more than 150 DML statements, (that is more than 150 update statement)
In a transaction you cannot update more than 10,000 records at a time. (* you can use batch apex if you want to update more)

Thank you,
Arunkumar RArunkumar R

There is no limit on DML Call Perday, It's everything applicable per transaction only.  

You can do Insert or update 10000 Records(Per Transaction)

For More details about the Governor Limits, 
James LoghryJames Loghry
Another point to bring up in addition to Kartik and Arunkumar's posts is that you're also limited in terms of API calls to the system.  The API calls is determined by the number of licenses you have on your system.  This is especially important if you're pushing your updates through an ETL or integration or Dataloader.  See the following document on API usage for more info:
Thanks All...