Quering data

- [x] `FROM` clause
- [x] `WHERE` clause
- [x] `DISTINCT`
- [x] `GROUP BY` clause
- [x] `HAVING` clause
- [x] Combining queries
      - `UNION`
      - `INTERSECT`
      - `EXCEPT`
- [x] Sorting rows (`ORDER BY`)
- [x] `LIMIT` and `OFFSET`
- [x] `WITH` queries
- [x] `JOIN` queries
      - ``INNER JOIN``
      - ``LEFT JOIN``
      - ``RIGHT JOIN``
      - ``FULL JOIN``
