diff --git a/queries.md b/queries.md
index c3c5329..4fe4d81 100644
--- a/queries.md
+++ b/queries.md
@@ -7,95 +7,119 @@
 **1. Add the `solid` and `chartjs` libraries as new rows to the `jslibraries` table.**
 
 <!-- Your Query Goes Here -->
+INSERT INTO jslibraries(name)
+VALUES ('solid')
 
+INSERT INTO jslibraries(name)
+VALUES ('chartjs')
 <br>
 
 **2. Get all the fields of the library that was released earliest (first).**
 
 <!-- Your Query Goes Here -->
-
+SELECT * FROM jslibraries
+WHERE release_date=(SELECT MIN(release_date) as earliest FROM jslibraries);
 <br>
 
 **3. Get all the fields of the library that was released most recently (last).**
 
 <!-- Your Query Goes Here -->
-
+SELECT * FROM jslibraries
+WHERE release_date=(SELECT MAX(release_date) as earliest FROM jslibraries);
 <br>
 
 **4. All the libraries released before 2015.**
 
 <!-- Your Query Goes Here -->
-
+SELECT * FROM jslibraries
+WHERE release_date<'2015-01-01';
 <br>
 
 **5. Get the `name` and the `release_date` of the libraries without a licence.**
 
 <!-- Your Query Goes Here -->
-
+SELECT name, release_date FROM jslibraries
+WHERE licence IS null ;
 <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.**
 
 <!-- Your Query Goes Here -->
-
+SELECT name FROM jslibraries
+WHERE main_technology = 'typescript';
 <br>
 
 **8. Get the `name` and the `type` of all the libraries with more than 1000 contributors.**
 
 <!-- Your Query Goes Here -->
-
+SELECT name, type FROM jslibraries
+WHERE contributors > 1000;
 <br>
 
 **9. Get the total number of `stars` of all the libraries.**
 
 <!-- Your Query Goes Here -->
-
+SELECT SUM(stars) FROM jslibraries;
 <br>
 
 **10. Get the average number of `contributors` for all the libraries.**
 
 <!-- Your Query Goes Here -->
-
+SELECT AVG(avg_contributors) FROM (
+SELECT count(contributors) as avg_contributors FROM jslibraries);
 <br>
 
 **11. Update the `licence` field of the libriaries without a licence to store `'unknown'` instead of `NULL`.**
 
 <!-- Your Query Goes Here -->
-
+UPDATE jslibraries
+SET licence = 'unknown'
+WHERE licence IS null;
 <br>
 
 **12. Update the `used_by` field of the libraries that don't have this information to store `'unknown'` instead of `NULL`.**
 
 <!-- Your Query Goes Here -->
+ALTER TABLE jslibraries 
+ALTER COLUMN used_by SET DATA TYPE VARCHAR(255);
 
+UPDATE jslibraries
+SET used_by = 'unknown'
+WHERE used_by IS null;
 <br>
 
 **13. Update all the records to capitalize the string provided in the `main_technology` field.**
 
 <!-- Your Query Goes Here -->
-
+UPDATE jslibraries
+SET main_technology = INITCAP(main_technology)
+RETURNING *;
 <br>
 
 **14. Delete all the records where `licence` is `'unknown'`.**
 
 <!-- Your Query Goes Here -->
-
+DELETE FROM jslibraries
+WHERE licence = 'unknown';
 <br>
 
 **15. Delete all the records with 10000 or less `stars`.**
 
 <!-- Your Query Goes Here -->
-
+DELETE FROM jslibraries
+WHERE stars < 10000;
 <br>
 
 **16. Delete all the records with less than 100 `releases`.**
 
 <!-- Your Query Goes Here -->
-
-<br>
+DELETE FROM jslibraries
+WHERE releases < 100;
+<br>
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