Question

I have a database table with 3 columns: _id, name, groupName

It looks similar to this:

1 Tom group1

2 Sam group1

3 Ted group2

4 Jerry group3

5 Me group3

I want to query the database table for groupName. I have tried this:

public Cursor getAllGroups() 
{
      return db.query(DATABASE_TABLE_1, new String[] {KEY_GROUP}, 
            null, null, null, null, null);
}

And this returns a cursor along: (group1, group1, group2, group3, group3).

Is there a way to get only unique groups? (So I would end up with a cursor along: (group1, group2, group3)

Thanks in advance.

Answer 1

I think you need use raw SQL query with DISTINCT keyword. Rough code would be something like:

db.rawQuery("select distinct groupName from "+DATABASE_TABLE_1, null);

Here is SQL tutorial about the keyword http://www.sql-tutorial.com/sql-distinct-sql-tutorial/