What is the use of Core Data and why we need it in iPhone development?

What is meant by Core Data in iPhone? Why we need it? What is the basic method开发者_C百科s in it?

Thanks in Advance

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It is essentially an ORM for the iPhone SDK, allowing you to define objects that act as a model which can be created, updated, and deleted through the use of OO and without writing SQL.

If you want more detail I would suggest accepting answers on your other posts like others have already suggested.