SQL topshirig'ining 8.6 darajasi
Quyidagi jadvallar berilgan:
| id | first_name | last_name |
|---|---|---|
| 1 | Joe | Doe |
| 2 | Erick | Brown |
| 3 | Max | Red |
| 3 | Alisa | Green |
| id | first_name | last_name |
|---|---|---|
| 1 | Maison | Molina |
| 2 | Mari | Mathews |
| 3 | Ciaran | Byrd |
| 4 | Levi | Miller |
| 5 | Emre | Benjamin |
| 6 | Kadie | Herrera |
| 7 | Lucas | Hussain |
| 8 | Joe | Solis |
| 9 | James | Curry |
| 10 | Wade | Baldwin |
| id | date | client_id | provider_id |
|---|---|---|---|
| 1 | 2022-01-18 | 2 | 3 |
| 2 | 2022-02-21 | 3 | 3 |
| 3 | 2022-03-31 | 1 | 3 |
| 4 | 2022-04-20 | 4 | 3 |
| 5 | 2022-05-17 | 5 | 2 |
| 6 | 2022-06-15 | 10 | 1 |
| 7 | 2022-07-13 | 9 | 1 |
| 8 | 2022-08-12 | 8 | 2 |
| 9 | 2022-09-09 | 7 | 1 |
| 10 | 2022-10-10 | 6 | 3 |
Ular uchun quyidagi masalalarni yeching:
O'tgan yilning har bir oyida eng ko'p uchrashuv o'tkazgan shifokorni toping. Shifokorlarning ismlarini, oyni va o'tkazilgan uchrashuvlar sonini chiqaring.
Eng ko'p turli shifokorlarga tashrif buyurgan mijozni toping. Uning ismini va tashrif buyurgan noyob shifokorlar sonini chiqaring.
