Does going to university in a different country affect your mental health? A Japanese international university surveyed its students in 2018 and published a study the following year that was approved by several ethical and regulatory boards.
The study found that international students have a higher risk of mental health difficulties than the general population, and that social connectedness (belonging to a social group) and acculturative stress (stress associated with joining a new culture) are predictive of depression.
Explore the students data using PostgreSQL to find out if you would come to a similar conclusion for international students and see if the length of stay is a contributing factor.
Here is a data description of the columns you may find helpful.
| Field Name | Description |
|---|---|
inter_dom | Types of students (international or domestic) |
japanese_cate | Japanese language proficiency |
english_cate | English language proficiency |
academic | Current academic level (undergraduate or graduate) |
age | Current age of student |
stay | Current length of stay in years |
todep | Total score of depression (PHQ-9 test) |
tosc | Total score of social connectedness (SCS test) |
toas | Total score of acculturative stress (ASISS test) |
-- Run this code to save the CSV file as students
SELECT *
FROM 'students.csv';-- Start coding here...
SELECT COUNT(*) AS total_records, COUNT(inter_dom) AS count_inter_dom
FROM students;
SELECT COUNT(*) AS total_records, COUNT(inter_dom) AS count_inter_dom
FROM students
WHERE inter_dom NOT LIKE 'Null'
GROUP BY inter_dom
ORDER BY inter_dom;SELECT ROUND(MIN(japanese),2) AS min_jap,
ROUND(MAX(japanese), 2) AS max_jap,
ROUND(MIN(english),2) AS min_eng,
ROUND(MAX(english), 2) AS max_eng
FROM students;SELECT ROUND(MIN(japanese),2) AS min_jap, ROUND(MAX(japanese), 2) AS max_jap,
ROUND(MIN(english),2) AS min_eng, ROUND(MAX(english), 2) AS max_eng
FROM students
WHERE inter_dom = 'Inter'
GROUP BY inter_dom;SELECT stay,
ROUND(AVG(todep), 2) AS average_phq,
ROUND(AVG(tosc),2) AS average_scs,
ROUND(AVG(toas), 2) AS average_as
FROM students
WHERE inter_dom = 'Inter'
GROUP BY stay
ORDER BY AVG(stay) DESC;