Project II: Impact of VR on Education

BC_VR_Impact_Julia_queries.sql

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+-- Question 01: What’s the global (geographical) distribution of VR usage in education? Where is VR used the most for educational purposes?
+SELECT 
+    regions.Region, 
+    COUNT(vr.Region) AS regions_using_VR_in_education
+FROM 
+    (SELECT DISTINCT Region FROM vr_usage) AS regions
+LEFT JOIN 
+    vr_usage vr ON regions.Region = vr.Region
+    AND vr.Usage_of_VR_in_Education = 'Yes'
+GROUP BY 
+    regions.Region
+ORDER BY 
+    regions_using_VR_in_education DESC;
+
+-- Question 02: Is there a subject for which VR is used the most or can be best applied for? Name the top 3 subjects for VR usage.
+SELECT
+    Subject, 
+    COUNT(Subject) AS VR_subjects
+FROM 
+    subjects
+WHERE
+    Usage_of_VR_in_Education = 'Yes'
+GROUP BY 
+    Subject
+ORDER BY 
+    VR_subjects DESC
+LIMIT 3;
+
+
+-- Question 03: Overall, is there an improvement in academic performance to be seen by using VR?
+SELECT
+    COUNT(CASE WHEN Improvement_in_Learning_Outcomes = 'Yes' THEN 1 END) AS improvement_through_VR,
+    COUNT(CASE WHEN Improvement_in_Learning_Outcomes = 'No' THEN 1 END) AS no_improvement_through_VR,
+    ROUND(
+        (COUNT(CASE WHEN Improvement_in_Learning_Outcomes = 'Yes' THEN 1 END) / COUNT(*)) * 100, 2 
+    ) AS percentage_improved,  # calculating the % by counting the cases where the condition is met (boolean value = yes = 1) & rounding to two digits
+    ROUND(
+        (COUNT(CASE WHEN Improvement_in_Learning_Outcomes = 'No' THEN 1 END) / COUNT(*)) * 100, 2 # round to two decimal places
+    ) AS percentage_not_improved
+FROM 
+    vr_usage
+WHERE
+    Usage_of_VR_in_Education = 'Yes';
+
+
+-- Question 04: Is there a relation between the level of improvement in academic performance and students’ IT affinity?
+
+# How to make assumptions on IT affinity now? > assumption: Computer Science students have a high affinity to IT. 
+# How to measure acceptance? The stress level with VR usage should be low and the perceived effectiveness should be over 3 (of 5)
+SELECT
+    COUNT(CASE WHEN Perceived_Effectiveness_of_VR > 3 AND Stress_Level_with_VR_Usage = 'Low' THEN 1 END) AS well_accepted,
+    COUNT(CASE WHEN Perceived_Effectiveness_of_VR < 3 AND Stress_Level_with_VR_Usage = 'High' THEN 1 END) AS not_well_accepted,
+    ROUND(
+        (COUNT(CASE WHEN Perceived_Effectiveness_of_VR > 3 AND Stress_Level_with_VR_Usage = 'Low' THEN 1 END) / 
+        COUNT(*)) * 100, 2 # calculating the % by counting the cases where the condition is met (boolean value = yes = 1) & rounding to two decimal places
+    ) AS percentage_accepted,
+    ROUND(
+        (COUNT(CASE WHEN Perceived_Effectiveness_of_VR < 3 AND Stress_Level_with_VR_Usage = 'High' THEN 1 END) / 
+        COUNT(*)) * 100, 2 # calculating the percentage and rounding to two decimal places
+    ) AS percentage_not_accepted
+FROM 
+    vr_usage
+WHERE
+    Usage_of_VR_in_Education = 'Yes' AND Subject = 'Computer Science';
+
+
+-- Question 05: What is the overall acceptance rate of VR in students?
+
+# Acceptance was measured the same way like in Question 04.
+SELECT
+    COUNT(CASE WHEN Perceived_Effectiveness_of_VR > 3 AND Stress_Level_with_VR_Usage = 'Low' THEN 1 END) AS well_accepted,
+    ROUND(
+        (COUNT(CASE WHEN Perceived_Effectiveness_of_VR > 3 AND Stress_Level_with_VR_Usage = 'Low' THEN 1 END) / 
+        COUNT(*)) * 100, 2 # calculating the percentage by counting conditions met and rounding to two decimal places
+	) AS percentage_accepted
+    FROM 
+    vr_usage
+WHERE
+    Usage_of_VR_in_Education = 'Yes';
+
+
+-- Question 06: How many students experience issues like motion sickness when using VR and how does it affect the improvement of academic performance?
+
+# The word is not about motion sickness but only stress level when using VR which can contain issues like motion sickness or feelings of oversaturation.
+SELECT
+    COUNT(CASE WHEN Improvement_in_Learning_Outcomes = 'Yes' THEN 1 END) AS improved_despite_stress,
+    COUNT(CASE WHEN Improvement_in_Learning_Outcomes = 'No' THEN 1 END) AS not_improved,
+    ROUND(
+        (COUNT(CASE WHEN Improvement_in_Learning_Outcomes = 'Yes' THEN 1 END) / COUNT(*)) * 100, 2
+    ) AS percentage_of_improvement_despite_stress,
+    ROUND(
+        (COUNT(CASE WHEN Improvement_in_Learning_Outcomes = 'No' THEN 1 END) / COUNT(*)) * 100, 2
+    ) AS percentage_no_improvement
+FROM 
+    vr_usage
+WHERE
+    Usage_of_VR_in_Education = 'Yes' AND Stress_Level_with_VR_Usage = 'High';
+# Conclusion: 50.90 compared to 49.10 percent means that it doesn't affect the improvement at all
+
+
+-- Question 07: How many students have access to a VR device in private and how many students use VR frequently in their free time for games etc.?
+
+# Since some students have a 'No' in usage of VR for education but anywas used hours per week, it leads to the assumption that it was used in private.
+
+# first part: access to VR device in private
+SELECT 
+    COUNT(*) AS Access_to_VR_Equipment, 
+    ROUND((COUNT(*) / 5000) * 100, 2) AS percentage_with_access
+FROM
+    vr_usage
+WHERE
+    Access_to_VR_Equipment = 'Yes';
+
+# second part: how many use VR in free time?
+SELECT 
+    COUNT(*) AS Hours_of_Usage_Per_Week, 
+    ROUND((COUNT(*) / 5000) * 100, 2) AS percentage_free_time_vr_users
+FROM
+    vr_usage
+WHERE
+    Usage_of_VR_in_Education = 'No' AND Hours_of_VR_Usage_Per_Week > 0;
+# This tells us in the table there are 45.08% of people using VR ONLY in their free time, but from the table cannot be read how many use it 
+# in education AND free time.
+
+
+-- Question 08: Is there any difference between the interest in VR in gender?
+SELECT 
+    students.Gender,
+    COUNT(*) AS Total_Students,
+    SUM(CASE WHEN vr_usage.Usage_of_VR_in_Education = 'Yes' 
+             AND vr_usage.Interest_in_Continuing_VR_Based_Learning = 'Yes' 
+        THEN 1 ELSE 0 END) AS Interested_Students,
+    ROUND(
+        (SUM(CASE WHEN vr_usage.Usage_of_VR_in_Education = 'Yes' 
+             AND vr_usage.Interest_in_Continuing_VR_Based_Learning = 'Yes' 
+        THEN 1 ELSE 0 END) / COUNT(*)) * 100, 2
+    ) AS Percentage_Interested
+FROM 
+    students
+JOIN 
+    vr_usage ON students.Field_of_Study = vr_usage.Field_of_Study
+GROUP BY 
+    students.Gender;
+
+-- Question 09: At which grade level and age is VR the most effective in education?
+SELECT 
+    students.Grade_Level,
+    students.Age,
+    COUNT(*) AS Total_Students,
+    SUM(CASE WHEN vr_usage.Improvement_in_Learning_Outcomes = 'Yes' THEN 1 ELSE 0 END) AS Improved_Students,
+    ROUND(
+        (SUM(CASE WHEN vr_usage.Improvement_in_Learning_Outcomes = 'Yes' THEN 1 ELSE 0 END) / COUNT(*)) * 100, 2
+    ) AS Improvement_Percentage
+FROM 
+    students
+JOIN 
+    vr_usage ON students.Field_of_Study = vr_usage.Field_of_Study
+WHERE 
+    vr_usage.Usage_of_VR_in_Education = 'Yes'
+GROUP BY 
+    students.Grade_Level, students.Age
+ORDER BY 
+    Improvement_Percentage DESC
+LIMIT 1;
+
+
+-- Question 10: Do students like to interact in VR or rather use it to learn things on their own?
+SELECT 
+    COUNT(*) AS Total_Students,
+    SUM(CASE WHEN vr_usage.Collaboration_with_Peers_via_VR = 'Yes' THEN 1 ELSE 0 END) AS interacting_students,
+    ROUND(
+        (SUM(CASE WHEN vr_usage.Collaboration_with_Peers_via_VR = 'Yes' THEN 1 ELSE 0 END) / COUNT(*)) * 100, 2
+    ) AS interacting_percentage
+FROM 
+    vr_usage;
+

README.md

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 # Business Challenge: EDA and SQL
 
 ## Introduction