Android sqlite: how to retrieve specific data from particular column?

Question

I am developing restaurant menu application. My app has a sqlite table which has these columns:

\"id\", \"category\", \"item_name\"

Content

Answer 1

Try this:

String vg ="Veg";
return database.rawQuery("SELECT * FROM subjects where " + KEY_CATEGORY + " = ?",
                            new String[]{vg});

Answer 2

  String q="SELECT * FROM todo WHERE category='" + vg +"'";
    SQLiteDatabase db = this.getWritableDatabase();
        Cursor cursor = null;
        cursor = db.rawQuery(q, null);
        if (cursor.moveToFirst()) {
            do {

            } while (cursor.moveToNext());

        }

Answer 3

try this:

String query = "SELECT * FROM todo WHERE category='" + vg;

Cursor  cursor = database.rawQuery(query,null);

        if (cursor != null) {
            cursor.moveToFirst();
        }
        return cursor;

Answer 4

String selectQuery = "select * from " + TABLE;
        sqlDatabase = this.getWritableDatabase();

     Cursor cursor = sqlDatabase.rawQuery(selectQuery, null);

    if (cursor != null) {
        cursor.moveToFirst();
    }


    return cursor;

this will help you..

Answer 5

here you can pass value for filter on

   public ArrayList<PlayListModel> getPlaylist(String playlistName) {
    SQLiteDatabase db = this.getReadableDatabase();
    ArrayList<PlayListModel> obj = new ArrayList<PlayListModel>();
    Cursor cursor = db.query(TABLE_PLAYLIST, new String[] { KEY_ID,
                    KEY_TITLE, KEY_SINGER , KEY_PATH , KEY_PLAYLISTNAME , KEY_DUR }, KEY_PLAYLISTNAME+ "=?",
            new String[] { playlistName }, null, null, null, null);
    if (cursor != null)
        cursor.moveToFirst();

    PlayListModel contact = new PlayListModel
            (cursor.getString(1),
                    cursor.getString(2),cursor.getString(3),
                    cursor.getString(4),cursor.getString(5));
    obj.add(contact);
    // return contact
    return obj;
}

Answer 6

dbHelper = new DBHelper(getApplicationContext());
SQLiteDatabase db = dbHelper.getReadableDatabase();

Cursor cursor = db.rawQuery("select * from centuaryTbl where email='"+email+"'",null);
if (cursor.moveToFirst())
{
    do
    {
        String s1 = cursor.getString(cursor.getColumnIndex("s1"));
        String s2 = cursor.getString(cursor.getColumnIndex("s2"));
        String s3 = cursor.getString(cursor.getColumnIndex("s3"));


    }while (cursor.moveToNext());
}