Update queriesroza.sql

src/sql/queries.sql

@@ -0,0 +1,63 @@
+
+SELECT * FROM regions;
+SELECT * FROM species;
+SELECT * FROM climate;
+SELECT * FROM observations;
+
+
+-- Mission 1: Which regions have the most recorded species?
+SELECT r.name AS region_name, COUNT(DISTINCT o.species_id) AS unique_species_count
+FROM regions r
+JOIN observations o ON r.id = o.region_id
+GROUP BY r.name
+ORDER BY unique_species_count DESC;
+
+-- Mission 2: Which months have the highest observation activity?
+SELECT strftime('%m', observation_date) AS month, COUNT(*) AS observation_count
+FROM observations
+GROUP BY month
+ORDER BY observation_count DESC;
+
+-- Mission 3: Detect species with few recorded individuals.
+SELECT s.common_name, COUNT(*) AS observation_count
+FROM species s
+JOIN observations o ON s.id = o.species_id
+GROUP BY s.common_name
+ORDER BY observation_count ASC
+LIMIT 10; -- Limit to the 10 least observed, adjust as needed
+
+-- Mission 4: Which region has the highest number of distinct species observed?
+SELECT r.name AS region_name, COUNT(DISTINCT o.species_id) AS unique_species_count
+FROM regions r
+JOIN observations o ON r.id = o.region_id
+GROUP BY r.name
+ORDER BY unique_species_count DESC
+LIMIT 1;
+
+-- Mission 5: Which species have been observed most frequently?
+SELECT s.common_name, COUNT(*) AS observation_frequency
+FROM species s
+JOIN observations o ON s.id = o.species_id
+GROUP BY s.common_name
+ORDER BY observation_frequency DESC
+LIMIT 10; -- Limit to the 10 most observed
+
+-- Mission 6: Who are the people with the most observation records?
+SELECT observer_name, COUNT(*) AS observation_count
+FROM observations
+GROUP BY observer_name
+ORDER BY observation_count DESC
+LIMIT 10; -- Limit to the top 10 observers
+
+-- Mission 7: Which species have never been observed?
+SELECT s.common_name
+FROM species s
+LEFT JOIN observations o ON s.id = o.species_id
+WHERE o.id IS NULL;
+
+-- Mission 8: On which dates were the most distinct species observed?
+SELECT observation_date, COUNT(DISTINCT species_id) AS distinct_species_count
+FROM observations
+GROUP BY observation_date
+ORDER BY distinct_species_count DESC
+LIMIT 10;