SQL vazifa to'plami 8.9 Darajasi
Quyidagi jadvallar berilgan:
| id | first_name | last_name |
|---|---|---|
| 1 | Jack | Brown |
| 2 | John | Doe |
| 3 | Max | White |
| id | name |
|---|---|
| 1 | IT |
| 1 | PHP |
| 2 | JavaScript |
| 3 | React |
| 4 | Angular |
| 5 | Vue.js |
| 6 | C/C++ |
| 7 | Rust |
| id | title | likes | author_id |
|---|---|---|---|
| 1 | Lorem ipsum | 1208 | 2 |
| 2 | Lorem ipsum dolor sit amet | 1503 | 2 |
| 3 | Lorem ipsum dolor sit | 2019 | 1 |
| 4 | Lorem ipsum dolor | 1099 | 3 |
| id | post_id | tag_id |
|---|---|---|
| 1 | 1 | 1 |
| 2 | 1 | 2 |
| 3 | 1 | 3 |
| 4 | 1 | 4 |
| 5 | 1 | 5 |
| 6 | 2 | 7 |
| 7 | 2 | 6 |
| 8 | 2 | 5 |
| 9 | 2 | 4 |
| 10 | 2 | 3 |
| 11 | 3 | 2 |
| 12 | 3 | 7 |
| 13 | 3 | 5 |
| 14 | 3 | 6 |
| 15 | 4 | 5 |
| 16 | 4 | 1 |
Ularni quyidagi masalalarni yeching:
Задание 1
Eng kam like soniga ega bo'lgan postlar uchun eng xos bo'lgan tegnı toping. Teg nomini, ushbu teg bilan postlardagi o'rtacha like sonini va jami shunday postlar sonini chiqaring.
Задание 2
Har biri kamida ikkita turli tegga ega bo'lgan maksimal sonli post yozgan muallifni toping. Muallif ismini, uning shunday postlar sonini va ushbu postlar ro'yxatini chiqaring.