sqlite android如何正确计算此SQL？

// 创建SQLiteOpenHelper子类
public class MyDatabaseHelper extends SQLiteOpenHelper {
    private static final String DATABASE_NAME = "mydatabase.db";
    private static final int DATABASE_VERSION = 1;

    public MyDatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        // 创建表格的SQL语句
        String createTableSql = "CREATE TABLE table_name (id INTEGER PRIMARY KEY, name TEXT)";
        db.execSQL(createTableSql);
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        // 数据库升级时的操作
    }
}

// 在Activity中使用数据库
public class MainActivity extends AppCompatActivity {
    private SQLiteDatabase db;

    @Override
    protected void onCreate(Bundle savedInstanceState) {
        super.onCreate(savedInstanceState);
        setContentView(R.layout.activity_main);

        // 创建数据库
        MyDatabaseHelper dbHelper = new MyDatabaseHelper(this);
        db = dbHelper.getWritableDatabase();

        // 执行SQL语句
        String sql = "SELECT * FROM table_name";
        Cursor cursor = db.rawQuery(sql, null);

        // 遍历查询结果
        if (cursor.moveToFirst()) {
            do {
                int id = cursor.getInt(cursor.getColumnIndex("id"));
                String name = cursor.getString(cursor.getColumnIndex("name"));
                // 处理查询结果
            } while (cursor.moveToNext());
        }

        // 关闭数据库连接
        cursor.close();
        db.close();
    }
}