Path: csiph.com!x330-a1.tempe.blueboxinc.net!newsfeed.hal-mli.net!feeder1.hal-mli.net!border3.nntp.dca.giganews.com!Xl.tags.giganews.com!border1.nntp.dca.giganews.com!nntp.giganews.com!local2.nntp.dca.giganews.com!nntp.pcisys.net!news.pcisys.net.POSTED!not-for-mail
NNTP-Posting-Date: Wed, 06 Apr 2011 17:53:40 -0500
From: Tom Harrington <tph@pcisys.no.spam.dammit.net>
Newsgroups: comp.lang.objective-c
Subject: Re: <newbie> SQLite vs Core Data
Organization: Atomic Bird
References: <98e32057-141f-4a50-8554-d5e00177ccc9@s9g2000yqm.googlegroups.com>
User-Agent: MT-NewsWatcher/3.5.1 (Intel Mac OS X)
Date: Wed, 06 Apr 2011 16:53:40 -0600
Message-ID: <tph-221F4A.16534006042011@localhost>
Lines: 52
X-Usenet-Provider: http://www.giganews.com
X-Trace: sv3-oYh+aIdpV5uPq7OZKhJpaTpCO6bZoFBhR4panue5g7YM3rCPf2m0K7fGz2SN5/TVrZty63+dzBwT04Y!8nBd6JB4tNs4JGQy2U5MNFy8+59zzElni5B5dSV4CTW4VQTxqovT7RKyIMj3kWJLNtwqfab5ZL5l!VNwucA==
X-Abuse-and-DMCA-Info: Please be sure to forward a copy of ALL headers
X-Abuse-and-DMCA-Info: Otherwise we will be unable to process your complaint properly
X-Postfilter: 1.3.40
X-Original-Bytes: 3112
Xref: x330-a1.tempe.blueboxinc.net comp.lang.objective-c:10

In article 
<98e32057-141f-4a50-8554-d5e00177ccc9@s9g2000yqm.googlegroups.com>,
 Suresh Kumar Narayanasamy <n.sureshkumar@gmail.com> wrote:

> Hi,
> I am from a asp.net brackground and trying to build a pilot IPAD
> application.
> We have some 50,000 products that needs to be imported from a
> webservice to the IPAD locally, so that customers can even view the
> products in airplane mode.
> so sto store the 50,000 products what approach i need to use.

You might want to consider building that data into the app instead of 
downloading it, because that might take a while to download. Unless the 
data changes quite frequently, building it in is a viable alternative.

> Do i need to use the SQLite or Core data?  My pilot project will
> enable the user to search for an products.
> Since i come from a web  development background and build a couple of
> apps using phonegap, i thought sqlite is the best approach.
> but reading some of the articles, it looks like there is an other
> approach called core data.

Both would work, which one you use depends on how the app needs to 
operate.

Core Data is not a database, it's an object repository that offers 
features like relationships, searching and sorting. Those features are 
similar to a database but you don't really use it the same way. It 
allows you to define objects that match your data model, and then save 
and retrieve those objects directly.

With SQLite you read and write database records, of course. Converting 
those to/from your model objects is an extra step that you would need to 
implement.

Apple has some introductory documents for Core Data that will help you 
figure out if it's the right tool for your app:

"Technology Overview": 
http://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/Co
reData/Articles/cdTechnologyOverview.html#//apple_ref/doc/uid/TP40009296-
SW1

"Core Data Basics": 
http://developer.apple.com/library/ios/#documentation/Cocoa/Conceptual/Co
reData/Articles/cdBasics.html#//apple_ref/doc/uid/TP40001650-TP1

-- 
Tom "Tom" Harrington
Independent Mac OS X developer since 2002
http://www.atomicbird.com/