Rentals: Медиана цены за ночь
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Посчитайте медиану nightly_price по всем объявлениям. Ожидаемая колонка: median_price
Структура таблиц
PRAGMA foreign_keys = ON;
CREATE TABLE hosts (id INTEGER PRIMARY KEY, host_name TEXT NOT NULL, country TEXT NOT NULL);
CREATE TABLE listings (id INTEGER PRIMARY KEY, host_id INTEGER NOT NULL, title TEXT NOT NULL, city TEXT NOT NULL, nightly_price INTEGER NOT NULL, max_guests INTEGER NOT NULL,
FOREIGN KEY(host_id) REFERENCES hosts(id));
CREATE TABLE bookings (id INTEGER PRIMARY KEY, listing_id INTEGER NOT NULL, guest_name TEXT NOT NULL, checkin TEXT NOT NULL, nights INTEGER NOT NULL, guests INTEGER NOT NULL, status TEXT NOT NULL,
FOREIGN KEY(listing_id) REFERENCES listings(id));
CREATE TABLE reviews (id INTEGER PRIMARY KEY, booking_id INTEGER NOT NULL, rating INTEGER NOT NULL, comment TEXT,
FOREIGN KEY(booking_id) REFERENCES bookings(id));
Пример данных
bookings
| id | listing_id | guest_name | checkin | nights | guests | status |
|---|---|---|---|---|---|---|
| 1 | 2 | Guest 1 | 2026-01-02 | 2 | 2 | confirmed |
| 2 | 3 | Guest 2 | 2026-01-03 | 3 | 3 | confirmed |
| 3 | 4 | Guest 3 | 2026-01-04 | 4 | 4 | confirmed |
| 4 | 5 | Guest 4 | 2026-01-05 | 5 | 5 | confirmed |
| 5 | 6 | Guest 5 | 2026-01-06 | 6 | 1 | confirmed |
Показано строк: 5 (LIMIT 5)
hosts
| id | host_name | country |
|---|---|---|
| 1 | Host 1 | DE |
| 2 | Host 2 | FR |
| 3 | Host 3 | ES |
| 4 | Host 4 | NL |
| 5 | Host 5 | DE |
Показано строк: 5 (LIMIT 5)
listings
| id | host_id | title | city | nightly_price | max_guests |
|---|---|---|---|---|---|
| 1 | 2 | Listing 1 | Utrecht | 70 | 2 |
| 2 | 3 | Listing 2 | Rotterdam | 80 | 3 |
| 3 | 4 | Listing 3 | Eindhoven | 90 | 4 |
| 4 | 5 | Listing 4 | Amsterdam | 100 | 5 |
| 5 | 6 | Listing 5 | Utrecht | 110 | 1 |
Показано строк: 5 (LIMIT 5)
reviews
| id | booking_id | rating | comment |
|---|---|---|---|
| 1 | 2 | 2 | good |
| 2 | 3 | 3 | great |
| 3 | 4 | 4 | ok |
| 4 | 5 | 5 | good |
| 5 | 6 | 1 | great |
Показано строк: 5 (LIMIT 5)
Ваш SQL
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