### Tables
Appointments

| id | slot_id | patient_name | doctor_id | deleted_at |
| -- | ------- | ------------ | --------- | ------ |
| 1 | 11 | Tasin | 23 | 2019-10-10 |
| 2 | 12 | Nawaz | 22 | null |
| 3 | 13 | Rakib | 23 | null |
| 4 | 14 | Hossen | 23 | null |
| 5 | 15 | Aritra | 24 | null |
| 6 | 16 | Anik | 22 | null |
| 7 | 17 | Manik | 22 | null |

Doctors
| id | status | doctor_name |
| -- | ------- | ------------ |
| 22 | 1 | Khaled |
| 23 | 1 | Hasan |
| 24 | 0 | Rumi |

Slots
| id | date | duration | time |
| -- | ------ | ------------ | ------- |
| 11 | 2019-10-10 | 2900 | 01:01 |
| 12 | 2019-10-11 | 1200 | 02:01 |
| 13 | 2019-10-18 | 1100 | 03:01 |
| 14 | 2019-09-08 | 200 | 11:01 |
| 15 | 2019-08-01 | 500 | 01:31 |
| 16 | 2019-10-07 | 300 | 02:31 |
| 17 | 2019-10-02 | 1200 | 03:31 |

### Output excected:
Follow usual database concepts and use common sense to understand the tables. Feel free to search Google for any syntax help.
**Solve as many as you can, even if you can only solve 1 query, please submit it.**

Q1. Write a SQL query to fetch ALL appointments on October,
ordered by slot_date_time in increasing order.

Output format:

| doctor_name | patient_name | slot_date_time |
| ----------- | ------------ | --------------- |
| X | Y | 2019-10-11 01:01 |
| P | Q | 2019-10-11 02:01 |
| N | N | 2019-10-12 00:01 |

Q2. Write a SQL query to fetch the doctor with highest number of appointments

Output format:

| doctor_name | appointment_count
| ----------- | ------------ |
| X | 2 |

Q3. Write a SQL query to show list of doctors with their total appointment durations in decreasing order.

Output format:

| doctor_name | total_duration
| ----------- | ------------ |
| X | 2000 |
| Y | 1200 |