done

queries.md

@@ -8,93 +8,162 @@
 
 <!-- Your Query Goes Here -->
 
+INSERT INTO jslibraries (name, owner, description, stars, url, releases, licence, used_by, contributors, main_technology, type, release_date)
+VALUES (
+'solid',
+'solidjs',
+'A declarative, efficient, and flexible JavaScript library for building user interfaces.',
+10700,
+'solidjs.com',
+194,
+'MIT License',
+624,
+73,
+'typescript',
+'UI Library',
+'2011-08-13'
+);
+INSERT INTO jslibraries (name, owner, description, stars, url, releases, licence, used_by, contributors, main_technology, type, release_date)
+VALUES (
+'chartjs',
+'chartjs',
+'Simple HTML5 Charts using the canvas tag.',
+54700,
+'chartjs.org',
+85,
+'MIT License',
+414000,
+377,
+'javascript',
+'Charts Library',
+'2011-11-02'
+);
 <br>
 
 **2. Get all the fields of the library that was released earliest (first).**
 
 <!-- Your Query Goes Here -->
 
+SELECT \*
+FROM jslibraries
+ORDER BY release_date
+LIMIT 1;
 <br>
 
 **3. Get all the fields of the library that was released most recently (last).**
+SELECT \*
+FROM jslibraries
+ORDER BY release_date DESC
+LIMIT 1;
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **4. All the libraries released before 2015.**
+SELECT \*
+FROM jslibraries
+WHERE release_date < '2015-01-01';
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **5. Get the `name` and the `release_date` of the libraries without a licence.**
+SELECT name, release_date
+FROM jslibraries
+WHERE licence IS NULL;
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **6. Get the `name` and the `stars` from all CSS Framework libraries.**
-
-<!-- Your Query Goes Here -->
+SELECT name, stars
+FROM jslibraries
+WHERE type = 'CSS Framework';
 
 <br>
 
 **7. Get the `name` of the libraries where the main technology is Typescript.**
+SELECT name
+FROM jslibraries
+WHERE main_technology = 'typescript';
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **8. Get the `name` and the `type` of all the libraries with more than 1000 contributors.**
+SELECT name, type
+FROM jslibraries
+WHERE contributors > 1000;
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **9. Get the total number of `stars` of all the libraries.**
+SELECT SUM(stars) AS total_stars
+FROM jslibraries;
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **10. Get the average number of `contributors` for all the libraries.**
+SELECT AVG(contributors) AS average_contributors
+FROM jslibraries;
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **11. Update the `licence` field of the libriaries without a licence to store `'unknown'` instead of `NULL`.**
+UPDATE jslibraries
+SET licence = 'unknown'
+WHERE licence IS NULL;
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **12. Update the `used_by` field of the libraries that don't have this information to store `'unknown'` instead of `NULL`.**
+UPDATE jslibraries
+SET used_by = 'unknown'
+WHERE used_by IS NULL;
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **13. Update all the records to capitalize the string provided in the `main_technology` field.**
+UPDATE jslibraries
+SET main_technology = INITCAP(main_technology);
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **14. Delete all the records where `licence` is `'unknown'`.**
+DELETE FROM jslibraries
+WHERE licence = 'unknown';
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **15. Delete all the records with 10000 or less `stars`.**
+DELETE FROM jslibraries
+WHERE stars <= 10000;
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **16. Delete all the records with less than 100 `releases`.**
+DELETE FROM jslibraries
+WHERE releases < 100;
 
 <!-- Your Query Goes Here -->