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btn_query.setOnClickListener(this);
btn_insert.setOnClickListener(this);
btn_update.setOnClickListener(this);
btn_delete.setOnClickListener(this);

public void save(Person p)
{
    SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
    db.execSQL("INSERT INTO person(name,phone) values(?,?)",
                new String[]{p.getName(),p.getPhone()});
}

public void delete(Integer id)
{
    SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
    db.execSQL("DELETE FROM person WHERE personid = ?",
                new String[]{id});
}

public void update(Person p)
{
    SQLiteDatabase db = dbOpenHelper.getWritableDatabase();
    db.execSQL
6. Query Record Count:

```java
public long getCount()
{
    SQLiteDatabase db = dbOpenHelper.getReadableDatabase();
    Cursor cursor =  db.rawQuery("SELECT COUNT (*) FROM person", null);
    cursor.moveToFirst();
    long result = cursor.getLong(0);
    cursor.close();
    return result;      
}