Best way to join tables using sqlite in android
In the implementation of SQLiteDatabase and SQLiteQueryBuilder you will see that it is possible to pass the tables you want to join to the table argument of query even though the documentation implies it will only take a single name of a table. The documentation for SQLiteQueryBuilder is more clear and even suggests things like foo, bar or foo LEFT OUTER JOIN bar ON (foo.id = bar.foo_id).
If you're willing to use a third-party library, I recommend using Active Android
https://github.com/pardom/ActiveAndroid
using it you can merge tables like this
From query = new Select() .from(Foo.class) .innerJoin(Bar.class) .on("Foo.Id=Bar.Id");you can even get a cursor back to use in loaders
Cursor cursor = Cache.openDatabase().rawQuery(query.toSql(), query.getArguments());more details here