SQLite query from multiple tables using SQLiteDatabase [duplicate]

Answer 1

Try this:

Cursor mCursor = db.rawQuery("SELECT * FROM Table1, Table2 " +
                             "WHERE Table1.id = Table2.id_table1 " +
                             "GROUP BY Table1.data1", null);

Answer 2

So when you need to JOIN Tables, you have to use rawQuery instead of query. So your statement

String SELECT_QUERY = SELECT * FROM Table1 t1 INNER JOIN Table2 t2 ON t1.id = t2.id GROUP BY t1.data1;

I recommend to you use JOIN because it more faster and safer then your approach. So then your rawQuery method can looks like this:

cursor = db.rawQuery(SELECT_QUERY, null);

Have look at rawQuery in SQLiteDatabase

Regards