diff --git a/solution.sql b/solution.sql
new file mode 100644
index 0000000..73bc2af
--- /dev/null
+++ b/solution.sql
@@ -0,0 +1,39 @@
+CREATE DATABASE publications;
+
+USE publications;
+/* Challenge 1 */
+SELECT authors.au_id AS AUTHOR_ID, authors.au_lname AS LAST_NAME, authors.au_fname AS FIRST_NAME, titles.title AS TITLE, publishers.pub_name AS PUBLISHER
+FROM authors
+JOIN titleauthor ON authors.au_id = titleauthor.au_id
+JOIN titles ON titleauthor.title_id = titles.title_id
+JOIN publishers ON titles.pub_id = publishers.pub_id;
+
+/* Challenge 2 */
+SELECT authors.au_id AS AUTHOR_ID, authors.au_lname AS LAST_NAME, authors.au_fname AS FIRST_NAME, publishers.pub_name AS PUBLISHER,
+COUNT(titles.title_id) AS TITLE_COUNT
+FROM authors
+JOIN titleauthor ON authors.au_id = titleauthor.au_id
+JOIN titles ON titleauthor.title_id = titles.title_id
+JOIN publishers ON titles.pub_id = publishers.pub_id
+GROUP BY authors.au_id, publishers.pub_name
+ORDER BY TITLE_COUNT DESC;
+  
+  /* Challenge 3 */
+SELECT authors.au_id AS AUTHOR_ID, authors.au_lname AS LAST_NAME, authors.au_fname AS FIRST_NAME,
+COUNT(titles.title_id) AS TITLE_COUNT
+FROM authors
+JOIN titleauthor ON authors.au_id = titleauthor.au_id
+JOIN titles ON titleauthor.title_id = titles.title_id
+GROUP BY authors.au_id, authors.au_lname, authors.au_fname
+ORDER BY TITLE_COUNT DESC
+LIMIT 3;
+
+/* Challenge 4 */
+SELECT authors.au_id AS AUTHOR_ID, authors.au_lname AS LAST_NAME, authors.au_fname AS FIRST_NAME,
+COUNT(titles.title_id) AS TOTAL
+FROM authors
+LEFT JOIN titleauthor ON authors.au_id = titleauthor.au_id
+LEFT JOIN titles ON titleauthor.title_id = titles.title_id
+GROUP BY authors.au_id, authors.au_lname, authors.au_fname
+ORDER BY TOTAL DESC;
+