MYSQL select Humberto Caballero

LAB.sql

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+#challege 1
+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 authors a 
+JOIN titleauthor ta 
+ON a.au_id = ta.au_id 
+JOIN titles t 
+ON ta.title_id = t.title_id 
+JOIN publishers p 
+ON  t.pub_id = p.pub_id ;
+
+#challenge 2 
+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',
+COUNT(t.title) as 'TITLE COUNT'
+FROM authors a 
+JOIN titleauthor ta 
+ON a.au_id = ta.au_id 
+JOIN titles t 
+ON ta.title_id = t.title_id 
+JOIN publishers p 
+ON  t.pub_id = p.pub_id
+GROUP BY title ;
+
+#challenge 3
+SELECT a.au_fname AS 'AUTHOR ID' , 
+a.au_lname AS 'L NAME' , 
+a.au_fname AS 'f NAME', 
+SUM(s.qty)  AS 'SALES'
+FROM authors  a              
+JOIN titleauthor t ON a.au_id = t.au_id
+JOIN titles te ON t.title_id = te.title_id
+JOIN sales s ON te.title_id = s.title_id
+GROUP BY a.au_id
+ORDER BY SALES DESC
+LIMIT 23 ;
+
+#challenge 4
+SELECT a.au_fname AS 'AUTHOR ID' , 
+a.au_lname AS 'L NAME' , 
+a.au_fname AS 'f NAME', 
+ IFNULL(SUM(s.qty),0) AS 'SALES'  
+FROM authors a              
+JOIN titleauthor t ON a.au_id = t.au_id
+JOIN titles te ON t.title_id = te.title_id
+JOIN sales s ON te.title_id = s.title_id
+GROUP BY a.au_id
+ORDER BY SALES DESC
+LIMIT 23  ;
+
+#challenge bonus
+ SELECT a.au_id  , a.au_lname AS 'Last NAME ',  SUM(t.ytd_sales*0.01*t.royalty +  advance) AS 'PROFIT'
+ FROM authors a 
+ JOIN titleauthor te 
+ ON a.au_id = te.au_id
+ JOIN titles t
+ ON te.title_id = t.title_id
+ GROUP BY au_id
+ ORDER BY PROFIT DESC
+ LIMIT 3 ;