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';SELECT stay_cate, COUNT(stay_cate)
FROM 'students.csv'
WHERE stay_cate IS NOT NULL
GROUP BY stay_cateSELECT stay_cate, COUNT(stay_cate)
FROM 'students.csv'
WHERE stay_cate IS NOT NULL
GROUP BY stay_cateSELECT inter_dom, COUNT(inter_dom)
FROM 'students.csv'
WHERE inter_dom IS NOT NULL
GROUP BY inter_domSELECT COUNT(*) AS total_records, COUNT(inter_dom) AS count_inter_dom, inter_dom,
ROUND(MIN(todep),2) AS min_phq, ROUND(MAX(todep),2) AS max_phq, ROUND(AVG(todep),2) AS avg_phq,
ROUND(MIN(tosc),2) AS min_scs, ROUND(MAX(tosc),2) AS max_scs, ROUND(AVG(tosc),2) AS avg_scs,
ROUND(MIN(toas),2) AS min_asiss, ROUND(MAX(toas),2) AS max_asiss, ROUND(AVG(toas),2) AS avg_asiss
FROM 'students.csv'
WHERE inter_dom IS NOT NULL AND inter_dom = 'Inter'
GROUP BY inter_dom-- Solution
SELECT
stay,
COUNT(stay_cate) AS count_int,
ROUND(AVG(todep),2) AS average_phq,
ROUND(AVG(tosc),2) AS average_scs,
ROUND(AVG(toas),2) AS average_as
FROM 'students.csv'
WHERE stay IS NOT NULL AND inter_dom = 'Inter'
GROUP BY stay
ORDER BY stay DESC
LIMIT 9