https://github.com/tasmidur/codingtest--telenorhealth-
https://github.com/tasmidur/codingtest--telenorhealth-
Last synced: 2 months ago
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- Host: GitHub
- URL: https://github.com/tasmidur/codingtest--telenorhealth-
- Owner: tasmidur
- Created: 2019-12-29T12:10:12.000Z (over 5 years ago)
- Default Branch: master
- Last Pushed: 2019-12-29T13:58:50.000Z (over 5 years ago)
- Last Synced: 2025-01-26T11:29:38.186Z (4 months ago)
- Language: TSQL
- Size: 15.6 KB
- Stars: 0
- Watchers: 1
- Forks: 0
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Awesome Lists containing this project
README
### Database Question and Solution
#### TABLE
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 |
SQL:
```sql
CREATE TABLE `appointments` (
`id` int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
`slot_id` int(10) NOT NULL,
`patient_name` varchar(255) NOT NULL,
`doctor_id` int(10) NOT NULL,
`deleted_at` timestamp NOT NULL DEFAULT current_timestamp()
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
INSERT INTO `appointments` (`id`, `slot_id`, `patient_name`, `doctor_id`, `deleted_at`) VALUES
(1, 11, 'Tasin', 23, '2019-10-09 18:00:00'),
(2, 12, 'Nawaz', 22, '2019-12-24 17:38:02'),
(3, 13, 'Rakib', 23, '2019-12-24 17:38:02'),
(4, 14, 'Hossen', 23, '2019-12-24 17:38:02'),
(5, 15, 'Aritra', 24, '2019-12-24 17:38:02'),
(6, 16, 'Anik', 22, '2019-12-24 17:38:02'),
(7, 17, 'Manik', 22, '2019-12-24 17:38:02');
```
Doctors
| id | status | doctor_name |
| -- | ------- | ------------ |
| 22 | 1 | Khaled |
| 23 | 1 | Hasan |
| 24 | 0 | Rumi |
SQL:
```sql
CREATE TABLE `doctors` (
`id` int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
`STATUS` int(5) NOT NULL,
`doctor_name` varchar(255) NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
INSERT INTO `doctors` (`id`, `STATUS`, `doctor_name`) VALUES
(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 |
SQL:
```sql
CREATE TABLE `slots` (
`id` int(11) NOT NULL AUTO_INCREMENT PRIMARY KEY,
`date` date NOT NULL,
`duration` int(20) NOT NULL,
`time` time NOT NULL
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4;
INSERT INTO `slots` (`id`, `date`, `duration`, `time`) VALUES
(11, '2019-10-10', 2900, '01:01:00'),
(12, '2019-10-11', 1200, '02:01:00'),
(13, '2019-10-18', 1100, '03:01:00'),
(14, '2019-09-08', 200, '11:01:00'),
(15, '2019-08-01', 500, '01:31:00'),
(16, '2019-10-07', 300, '02:31:00'),
(17, '2019-10-02', 1200, '03:01:00');
```
### 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 |
Solution:
```sql
SELECT
doctors.doctor_name,
appointments.patient_name,
CONCAT(
slots.date,
' ',
TIME_FORMAT(slots.time, '%h:%i')
) AS slot_date_time
FROM
appointments
JOIN slots ON appointments.slot_id = slots.id
JOIN doctors ON appointments.doctor_id = doctors.id
WHERE
MONTH(DATE) = 10
ORDER BY `slot_date_time` ASC
```
Q2. Write a SQL query to fetch the doctor with highest number of appointments
Output format:
| doctor_name | appointment_count
| ----------- | ------------ |
| X | 2 |
Solution:
```sql
SELECT tmp.doctor_name,MAX(total_appoinments) as appointment_count FROM (
SELECT doctors.doctor_name as doctor_name,COUNT(appointments.doctor_id) as total_appoinments
FROM
appointments
JOIN doctors ON appointments.doctor_id=doctors.id
GROUP BY appointments.doctor_id
)tmp
```
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 |
Solution:
```sql
SELECT
doctors.doctor_name,
SUM(slots.duration) AS total_duration
FROM
appointments
JOIN slots ON appointments.slot_id = slots.id
JOIN doctors ON appointments.doctor_id = doctors.id
WHERE
appointments.doctor_id IN(
SELECT
appointments.doctor_id
FROM
appointments
JOIN slots ON appointments.slot_id = slots.id
JOIN doctors ON appointments.doctor_id = doctors.id
GROUP BY
appointments.doctor_id
)
GROUP BY
appointments.doctor_id
ORDER BY
total_duration DESC
```