From a7510c9981e5a85f1f7610e485bffe685734c546 Mon Sep 17 00:00:00 2001
From: Raghad <128425356+RaghadAlmutairi@users.noreply.github.com>
Date: Tue, 25 Mar 2025 21:40:50 +0300
Subject: [PATCH] Add files via upload

---
 solution.sql | 67 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 67 insertions(+)
 create mode 100644 solution.sql

diff --git a/solution.sql b/solution.sql
new file mode 100644
index 0000000..4bf0e61
--- /dev/null
+++ b/solution.sql
@@ -0,0 +1,67 @@
+-- ============================================
+-- Challenge 1 - Who Have Published What At Where?
+-- Get author details, title, and publisher name
+-- ============================================
+SELECT 
+    a.au_id AS "AUTHOR ID",
+    a.au_lname AS "LAST NAME",
+    a.au_fname AS "FIRST NAME",
+    t.title AS "TITLE",
+    p.pub_name AS "PUBLISHER"
+FROM titleauthor ta
+JOIN authors a ON ta.au_id = a.au_id
+JOIN titles t ON ta.title_id = t.title_id
+JOIN publishers p ON t.pub_id = p.pub_id
+ORDER BY a.au_id;
+
+
+
+-- ============================================
+-- Challenge 2 - Who Have Published How Many At Where?
+-- Count number of titles per author at each publisher
+-- ============================================
+SELECT 
+    a.au_id AS "AUTHOR ID",
+    a.au_lname AS "LAST NAME",
+    a.au_fname AS "FIRST NAME",
+    p.pub_name AS "PUBLISHER",
+    COUNT(*) AS "TITLE COUNT"
+FROM titleauthor ta
+JOIN authors a ON ta.au_id = a.au_id
+JOIN titles t ON ta.title_id = t.title_id
+JOIN publishers p ON t.pub_id = p.pub_id
+GROUP BY a.au_id, p.pub_name
+ORDER BY COUNT(*) DESC, a.au_lname, a.au_fname;
+
+
+-- ============================================
+-- Challenge 3 - Best Selling Authors
+-- Top 3 authors by number of titles sold
+-- ============================================
+SELECT 
+    a.au_id AS "AUTHOR ID",
+    a.au_lname AS "LAST NAME",
+    a.au_fname AS "FIRST NAME",
+    SUM(s.qty) AS "TOTAL"
+FROM titleauthor ta
+JOIN authors a ON ta.au_id = a.au_id
+JOIN sales s ON ta.title_id = s.title_id
+GROUP BY a.au_id
+ORDER BY TOTAL DESC
+LIMIT 3;
+
+
+-- ============================================
+-- Challenge 4 - Best Selling Authors Ranking
+-- All authors ranked by sales (including zero)
+-- ============================================
+SELECT 
+    a.au_id AS "AUTHOR ID",
+    a.au_lname AS "LAST NAME",
+    a.au_fname AS "FIRST NAME",
+    IFNULL(SUM(s.qty), 0) AS "TOTAL"
+FROM authors a
+LEFT JOIN titleauthor ta ON a.au_id = ta.au_id
+LEFT JOIN sales s ON ta.title_id = s.title_id
+GROUP BY a.au_id
+ORDER BY TOTAL DESC;