GoodThought NGO has been a catalyst for positive change, focusing its efforts on education, healthcare, and sustainable development to make a significant difference in communities worldwide. With this mission, GoodThought has orchestrated an array of assignments aimed at uplifting underprivileged populations and fostering long-term growth.
This project offers a hands-on opportunity to explore how data-driven insights can direct and enhance these humanitarian efforts. In this project, you'll engage with the GoodThought PostgreSQL database, which encapsulates detailed records of assignments, funding, impacts, and donor activities from 2010 to 2023. This comprehensive dataset includes:
Assignments: Details about each project, including its name, duration (start and end dates), budget, geographical region, and the impact score.Donations: Records of financial contributions, linked to specific donors and assignments, highlighting how financial support is allocated and utilized.Donors: Information on individuals and organizations that fund GoodThought’s projects, including donor types.
Refer to the below ERD diagram for a visual representation of the relationships between these data tables:
You will execute SQL queries to answer two questions, as listed in the instructions. Good luck!
-- highest_donation_assignments
SELECT assignment_name,
region,
-- Round to 2 decimal points and sum the total
ROUND(SUM(amount), 2) AS rounded_total_donation_amount,
donor_type
FROM assignments as a
INNER JOIN donations as d -- Join donations table on assignment_id key
ON a.assignment_id = d.assignment_id
INNER JOIN donors -- Join donors tabel to donations table on donor_id key
ON d.donor_id = donors.donor_id
GROUP BY donor_type, assignment_name, region
ORDER BY rounded_total_donation_amount DESC
LIMIT 5;-- top_regional_impact_assignments
-- CTE FOR TOTAL NUMBER OF DONATIONS PER ASSIGNMENT
WITH total_donations as(
SELECT a.assignment_id, COUNT(donation_id) AS num_total_donations
FROM assignments as a
INNER JOIN donations as d
ON a.assignment_id = d.assignment_id
GROUP BY a.assignment_id
),
-- CTE FOR RANKING ASSIGNMENTS PER REGION
assignments_ranks as(
SELECT a.assignment_id,
a.assignment_name,
a.region,
a.impact_score,
ROW_NUMBER() OVER(PARTITION BY region
ORDER BY impact_score DESC) AS row_n,
Rank() OVER(PARTITION BY region
ORDER BY impact_score DESC) AS rank_n
FROM assignments as a
)
SELECT assignment_name, region, impact_score, td.num_total_donations
FROM assignments_ranks as ar
INNER JOIN total_donations as td
ON ar.assignment_id = td.assignment_id
WHERE rank_n = 1 AND row_n = 1
ORDER BY region ASC;