Does iPhone app updation remove apps Data from iPhone

I wanted to know that if i have installed an application in my iPhone and it has a database attached with that which is saved into the particular app folder in iPhone. Now from my application i am updating the database with adding more records and filling up the database fields.

Now my app has a newer version available. I updated my iphone app. Now does it remove all the database records and create the a new empty database ?? or my all my app personal data will remain there as untouched when app has been updated to newer version.

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Thanks

Well that all depends, all the data in the app bundle will be replaced, If you placed your data in the document directory it will be unaffected.