I've only read a little bit about the DB.. is it possible to create/store on on the SD card? If we're limited to 24MB ram, 16MB on older devices, does that restrict the amount of data a DB can store as well? Seems it should be possible to put the DB on the SD card.
On Wed, Jan 6, 2010 at 11:56 PM, Nithin <[email protected]> wrote: > > > Firstly, is it possible to implement composite keys? > > Yes, its possible. > > Can do something like this, > > CREATE *TABLE* example1( > field1 text not null, > field2 text not null, > *PRIMARY* *KEY*(field1, field2) > ); > > > > And secondly, how can I load a pre-created database onto an Android > > device efficiently? > > Database will be loaded, when you load the apk into the deveice. All > the resource, that application has (like files, database etc.) will be > bundled in the .apk file. And moreover, Database is private to the > application in Android. > > Nithin > > > > On Jan 4, 7:44 pm, verb <[email protected]> wrote: > > I'm currently doing a project which requires a potentially large > > underlying relational database, and have a couple of queries on how to > > implement this in Android. > > > > Firstly, is it possible to implement composite keys? I have seen > > methods which suggest that all primary keys in a database must be > > called '_id' for Android to recognise them, but cannot find anything > > on if there is more than one key in a table. > > > > And secondly, how can I load a pre-created database onto an Android > > device efficiently? It will only need to be added once on > > installation, but potentially be updated or have individual entries > > added by the user. > > > > I am currently implementing in API Level 4 (Android 1.6). > > > > Thanks in advance. > > -- > You received this message because you are subscribed to the Google > Groups "Android Beginners" group. > > NEW! Try asking and tagging your question on Stack Overflow at > http://stackoverflow.com/questions/tagged/android > > To unsubscribe from this group, send email to > [email protected]<android-beginners%[email protected]> > For more options, visit this group at > http://groups.google.com/group/android-beginners?hl=en > >
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