Done

queries.md

@@ -8,57 +8,76 @@
 
 <!-- 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'),
+('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).**
+SELECT \* FROM jslibraries
+ORDER BY release_date ASC
+LIMIT 1;
 
 <!-- Your Query Goes Here -->
 
 <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 >= '01-01-2015'
+ORDER BY release_date ASC
 
 <!-- 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 NOT licence = 'MIT LICENSE'
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **6. Get the `name` and the `stars` from all CSS Framework libraries.**
+SELECT name,stars FROM jslibraries WHERE type = 'CSS Framework'
 
 <!-- Your Query Goes Here -->
 
 <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) FROM jslibraries
 
 <!-- Your Query Goes Here -->
 
 <br>
 
 **10. Get the average number of `contributors` for all the libraries.**
+SELECT AVG(contributors) FROM jslibraries
 
 <!-- Your Query Goes Here -->
 
@@ -71,30 +90,41 @@
 <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 = CONCAT(
+UPPER(SUBSTRING(main_technology, 1, 1)),
+LOWER(SUBSTRING(main_technology, 2, LENGTH(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 -->