Pull Request for using indexing in vet_clinic

README.md

@@ -1,31 +1,25 @@
 # curriculum-databases-projects-template
 
-> This template should be used for database related projects at Microverse.
-> Generate your own repository, update this README and edit all files content while working on projects. You should not be adding any new files unless asked otherwise.
+feature_branch_day_4_SQL
+> This is a project showing data of animals in a vet-clinic. Different queries can be made using SQL commands. In this branch more new tables,data are added.Queries are made utilising JOIN. Many to many relationships are established. Different queries are made utilising different types of JOIN.
 
 
 ## Getting Started
 
-This repository includes files with plain SQL that can be used to recreate a database:
+This repository includes 3 files with plain SQL that can be used to recreate a database:
 
-- Use [schema.sql](./schema.sql) to create all tables.
-- Use [data.sql](./data.sql) to populate tables with sample data.
-- Check [queries.sql](./queries.sql) for examples of queries that can be run on a newly created database. **Important note: this file might include queries that make changes in the database (e.g., remove records). Use them responsibly!**
+- schema.sql which creates all tables.
+- data.sql to populate tables with sample data.
+- queries.sql for examples of queries that can be run on a newly created database using JOIN. 
 
 
 ## Authors
 
-👤 **Author1**
+👤 **Tanusri Ghosh**
 
-- GitHub: [@githubhandle](https://github.com/githubhandle)
-- Twitter: [@twitterhandle](https://twitter.com/twitterhandle)
-- LinkedIn: [LinkedIn](https://linkedin.com/in/linkedinhandle)
-
-👤 **Author2**
-
-- GitHub: [@githubhandle](https://github.com/githubhandle)
-- Twitter: [@twitterhandle](https://twitter.com/twitterhandle)
-- LinkedIn: [LinkedIn](https://linkedin.com/in/linkedinhandle)
+- GitHub: https://github.com/chuaindia)
+- Twitter: https://twitter.com/chuaghosh@
+- LinkedIn:https://linkedin.com/in/tanusrighosh
 
 ## 🤝 Contributing
 

data.sql

@@ -1,5 +1,120 @@
 /* Populate database with sample data. */
 
-INSERT INTO animals (name) VALUES ('Luna');
-INSERT INTO animals (name) VALUES ('Daisy');
-INSERT INTO animals (name) VALUES ('Charlie');
+INSERT INTO animals (name, date_of_birth, escape_attempts, neutered, weight_kg) VALUES 
+  ('Agumon', '02-03-2020', 0, 'True', 10.23),
+  ('Gabumon', '11-15-2018', 2, 'True', 8),
+  ('Pikachu', '01-07-2021', 1, 'False', 15.04),
+  ('Devimon', '05-12-2017', 5, 'True', 11);
+
+/* Day2 */
+
+INSERT INTO animals (name, date_of_birth, escape_attempts, neutered, weight_kg) VALUES 
+  ('Charmander', '02-08-2020', 0, 'False', -11),
+  ('Plantmon', '11-15-2021', 2, 'True', -5.7),
+  ('Squirtle', '04-02-1993', 3, 'False', -12.13),
+  ('Angemon', '06-12-2005', 1, 'True', -45),
+  ('Boarmon', '06-07-2005', 7, 'True', 20.4),
+  ('Blossom', '10-13-1998', 3, 'True', 17),
+  ('Ditto', '05-14-2022', 4, 'True', 22);
+
+/* Day3 */  
+
+INSERT INTO owners (full_name, age)
+VALUES
+('Sam Smith', 34),
+('Jennifer Orwell', 19),
+('Bob', 45),
+('Melody Pond', 77),
+('Dean Winchester', 14),
+('Jodie Whittaker', 38);
+
+INSERT INTO species (name)
+VALUES
+('Pokemon'),
+('Digimon');
+
+UPDATE animals SET species_id = 1 WHERE name LIKE '%mon';
+UPDATE animals SET species_id = 2 WHERE name NOT LIKE '%mon';
+
+UPDATE animals SET owner_id = 1 WHERE name IN ('Agumon');
+UPDATE animals SET owner_id = 2 WHERE name IN ('Gabumon','Pikachu');
+UPDATE animals SET owner_id = 3 WHERE name IN ('Devimon','Plantmon');
+UPDATE animals SET owner_id = 4 WHERE name IN ('Charmander','Squirtle','Blossom');
+UPDATE animals SET owner_id = 5 WHERE name IN ('Angemon','Boarmon');
+
+/* Day 4 */
+
+INSERT INTO vets (name, age, date_of_graduation) VALUES 
+('William Tatcher', 45, '04-23-2000'),
+('Maisy Smith', 26, '01-17-2019'),
+('Stephanie Mendez', 64, '05-04-1981'),
+('Jack Harkness', 38, '06-08-2008');
+
+INSERT INTO specializations (vets_id, species_id) VALUES 
+(1, 1),
+(3, 2),
+(3, 1),
+(4, 2);
+
+INSERT INTO visits (animals_id, vets_id, date_of_visit) VALUES 
+(1, 1, '05-24-2020'),
+(1, 3, '07-22-2020'),
+(2, 4, '02-02-2021'),
+(3, 2, '01-05-2020'),
+(3, 2, '03-08-2020'),
+(3, 2, '05-14-2020'),
+(4, 3, '05-04-2021'),
+(5, 4, '02-24-2021'),
+(6, 2, '12-21-2019'),
+(6, 1, '08-10-2020'),
+(6, 2, '04-07-2021'),
+(7, 3, '09-29-2019'),
+(8, 4, '10-03-2020'),
+(8, 4, '11-04-2020'),
+(9, 2, '01-24-2019'),
+(9, 2, '05-15-2019'),
+(9, 2, '02-27-2020'),
+(9, 2, '08-03-2020'),
+(10, 3, '05-24-2020'),
+(10, 1, '01-11-2021');
+
+
+/* day 5, 2nd week -- Pair Programming */
+
+
+-- This will add 3.594.280 visits considering you have 10 animals, 4 vets, and it will use around ~87.000 timestamps (~4min approx.)
+INSERT INTO visits (animal_id, vet_id, date_of_visit) SELECT * FROM (SELECT id FROM animals) animal_ids, (SELECT id FROM vets) vets_ids, generate_series('1980-01-01'::timestamp, '2021-01-01', '4 hours') visit_timestamp;
+
+-- This will add 2.500.000 owners with full_name = 'Owner <X>' and email = 'owner_<X>@email.com' (~2min approx.)
+insert into owners (full_name, email) select 'Owner ' || generate_series(1,2500000), 'owner_' || generate_series(1,2500000) || '@mail.com';
+
+/* Execution Time 216.905 ms */
+
+
+-- This will add 3.594.280 visits considering you have 10 animals, 4 vets, and it will use around ~87.000 timestamps (~4min approx.)
+INSERT INTO visits (animal_id, vet_id, date_of_visit) SELECT * FROM (SELECT id FROM animals) animal_ids, (SELECT id FROM vets) vets_ids, generate_series('1980-01-01'::timestamp, '2021-01-01', '4 hours') visit_timestamp;
+
+-- This will add 2.500.000 owners with full_name = 'Owner <X>' and email = 'owner_<X>@email.com' (~2min approx.)
+insert into owners (full_name, email) select 'Owner ' || generate_series(1,2500000), 'owner_' || generate_series(1,2500000) || '@mail.com';
+
+/* Execution Time 435.957 ms */
+
+
+-- This will add 3.594.280 visits considering you have 10 animals, 4 vets, and it will use around ~87.000 timestamps (~4min approx.)
+INSERT INTO visits (animal_id, vet_id, date_of_visit) SELECT * FROM (SELECT id FROM animals) animal_ids, (SELECT id FROM vets) vets_ids, generate_series('1980-01-01'::timestamp, '2021-01-01', '4 hours') visit_timestamp;
+
+-- This will add 2.500.000 owners with full_name = 'Owner <X>' and email = 'owner_<X>@email.com' (~2min approx.)
+insert into owners (full_name, email) select 'Owner ' || generate_series(1,2500000), 'owner_' || generate_series(1,2500000) || '@mail.com';
+
+
+/* Execution Time 654.253 ms */
+
+-- This will add 3.594.280 visits considering you have 10 animals, 4 vets, and it will use around ~87.000 timestamps (~4min approx.)
+INSERT INTO visits (animal_id, vet_id, date_of_visit) SELECT * FROM (SELECT id FROM animals) animal_ids, (SELECT id FROM vets) vets_ids, generate_series('1980-01-01'::timestamp, '2021-01-01', '4 hours') visit_timestamp;
+
+-- This will add 2.500.000 owners with full_name = 'Owner <X>' and email = 'owner_<X>@email.com' (~2min approx.)
+insert into owners (full_name, email) select 'Owner ' || generate_series(1,2500000), 'owner_' || generate_series(1,2500000) || '@mail.com';
+
+
+/* Execution Time 1009.139 ms */
+

queries.sql

@@ -1,3 +1,195 @@
 /*Queries that provide answers to the questions from all projects.*/
 
-SELECT * from animals WHERE name = 'Luna';
+SELECT * from animals WHERE name = '%mon';
+SELECT * FROM animals WHERE date_of_birth BETWEEN '2016-01-01' AND '2019-12-31';
+SELECT * FROM animals WHERE neutered='True' AND escape_attempts<3; 
+SELECT date_of_birth FROM animals WHERE name IN ('Agumon','Pikachu'); 
+SELECT name, escape_attempts FROM animals WHERE weight_kg>10.5;
+SELECT * FROM animals WHERE neutered='True'; 
+SELECT * FROM animals WHERE name NOT IN ('Gabumon');
+SELECT * FROM animals WHERE weight_kg BETWEEN 10.4 AND 17.3;
+
+/* Day 2 */
+
+/* Transaction 1 */
+
+BEGIN;
+
+UPDATE animals SET species='unspecified';
+
+SELECT species FROM animals;
+ROLLBACK;
+
+SELECT species FROM animals;
+
+UPDATE animals SET species='digimon' WHERE name LIKE '%mon';
+UPDATE animals SET species='pokemon' WHERE species NOT LIKE '%mon';
+
+COMMIT;
+
+SELECT * FROM animals;
+
+/* Transaction 2 */
+
+BEGIN;
+
+DELETE FROM animals;
+
+ROLLBACK;
+
+/* Transaction 3 */
+
+BEGIN;
+
+SAVEPOINT SP1;
+
+DELETE FROM animals WHERE date_of_birth > '2022-01-01';
+
+SAVEPOINT SP2;
+
+UPDATE animals SET weight_kg = weight_kg * -1;
+
+ROLLBACK TO SP2;
+
+UPDATE animals SET weight_kg = weight_kg * -1 WHERE weight_kg < 0;
+
+COMMIT;
+
+SELECT * FROM animals;
+
+/* Answer of the Questions */
+
+SELECT COUNT(*) FROM animals;
+SELECT COUNT(*) FROM animals WHERE escape_attempts = 0;
+SELECT AVG(weight_kg) FROM animals;
+SELECT neutered, MAX(escape_attempts) FROM animals GROUP BY neutered;
+SELECT species, MIN(weight_kg) as Minimum, MAX(weight_kg) as Maximum FROM animals GROUP BY species;
+SELECT AVG(escape_attempts) FROM animals WHERE date_of_birth BETWEEN '1990-01-01' AND '2000-12-31' GROUP BY species;
+
+
+/* Day3 */ 
+
+SELECT name FROM animals
+JOIN owners ON owners.id = animals.owner_id
+WHERE owners.full_name = 'Melody Pond';
+
+SELECT animals.name FROM animals
+JOIN species ON species.id = animals.species_id
+WHERE species.name = 'Pokemon';
+
+SELECT name AS name_of_animals, full_name AS name_of_owners FROM owners
+LEFT JOIN animals ON owners.id = animals.owner_id;
+
+SELECT species.name, COUNT(*) FROM animals
+LEFT JOIN species ON species.id = animals.species_id
+GROUP BY species.name;
+
+SELECT animals.name FROM animals
+JOIN species ON species.id = animals.species_id
+JOIN owners ON owners.id = animals.owner_id
+WHERE species.name = 'Digimon' AND owners.full_name = 'Jennifer Orwell' ;
+
+SELECT name FROM animals
+JOIN owners ON owners.id = animals.owner_id
+WHERE owners.full_name = 'Dean Winchester' AND animals.escape_attempts = 0;
+
+SELECT full_name, COUNT(full_name) AS maximum FROM animals
+JOIN owners ON owners.id = animals.owner_id
+GROUP BY owners.full_name
+ORDER BY maximum
+DESC LIMIT 1;
+
+
+/* Day 4 */
+
+SELECT animals.name FROM visits
+JOIN animals on animals.id = visits.animals_id
+JOIN vets on vets.id = visits.vets_id
+WHERE vets.name = 'William Tatcher'
+ORDER BY date_of_visit
+DESC LIMIT 1;
+
+SELECT vets.name, COUNT(*) FROM visits
+JOIN animals on animals.id = visits.animals_id
+JOIN vets on vets.id = visits.vets_id
+WHERE vets.name = 'Stephanie Mendez'
+GROUP BY vets.name;
+
+SELECT vets.name, species.name FROM vets
+LEFT JOIN specializations on vets.id = specializations.vets_id
+LEFT JOIN species on species.id = specializations.species_id;
+
+SELECT animals.name FROM visits
+JOIN vets on vets.id = visits.vets_id
+JOIN animals on animals.id = visits.animals_id
+WHERE vets.name = 'Stephanie Mendez'
+AND date_of_visit BETWEEN '04-01-2020' AND '08-30-2020';
+
+SELECT animals.name, COUNT(*) AS number_of_visits FROM visits
+JOIN vets on vets.id = visits.vets_id
+JOIN animals on animals.id = visits.animals_id
+GROUP BY animals.name
+ORDER BY number_of_visits
+DESC LIMIT 1;
+
+SELECT animals.name FROM visits
+JOIN vets on vets.id = visits.vets_id
+JOIN animals on animals.id = visits.animals_id
+WHERE vets.name = 'Maisy Smith'
+ORDER BY date_of_visit
+LIMIT 1;
+
+SELECT animals.name, vets.name, date_of_visit FROM visits
+JOIN vets on vets.id = visits.vets_id
+JOIN animals on animals.id = visits.animals_id
+ORDER BY date_of_visit
+DESC LIMIT 1;
+
+SELECT COUNT(*) FROM vets
+LEFT JOIN visits on vets.id = visits.vets_id
+LEFT JOIN specializations on vets.id = specializations.vets_id
+LEFT JOIN species on species.id = specializations.species_id
+WHERE species.name is NULL;
+
+SELECT species.name, COUNT(*) FROM visits
+JOIN vets on vets.id = visits.vets_id
+JOIN animals on animals.id = visits.animals_id
+JOIN species on species.id = animals.species_id
+WHERE vets.name = 'Maisy Smith'
+GROUP BY species.name
+LIMIT 1;
+
+
+/* day 5, 2nd week -- Pair Programming */
+
+explain analyze SELECT COUNT(*) FROM visits where animal_id = 4;
+
+/* Execution Time 216.905 ms */
+
+
+explain analyze SELECT COUNT(*) FROM visits where animal_id = 4;
+
+/* Execution Time 435.957 ms */
+
+explain analyze SELECT COUNT(*) FROM visits where animal_id = 4;
+
+/* Execution Time 654.253 ms */
+
+explain analyze SELECT COUNT(*) FROM visits where animal_id = 4;
+
+/* Execution Time 1009.139 ms */
+
+EXPLAIN ANALYZE SELECT * FROM visits where vet_id = 2;
+
+/* Execution Time 2085.938 ms */
+
+EXPLAIN ANALYZE SELECT * FROM owners where email = '[email protected]';
+
+/* Execution Time 814.106 ms */
+
+
+
+
+
+
+