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Nico #2

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Nico
nico-stan Jul 20, 2022
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nico-stan Jul 20, 2022
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nico-stan Jul 20, 2022
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43 changes: 43 additions & 0 deletions your-code/solutions.sql
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Original file line number Diff line number Diff line change
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USE publications;

#Challenge 1 - Who Have Published What At Where?
SELECT authors.au_id as 'AUTHOR ID', au_lname as 'LAST NAME', au_fname as 'FIRST NAME', title as 'TITLE', pub_name as 'PUBLISHER'
FROM titles
LEFT JOIN titleauthor
ON titles.title_id = titleauthor.title_id
LEFT JOIN authors
ON titleauthor.au_id = authors.au_id
LEFT JOIN publishers
ON titles.pub_id=publishers.pub_id;

#Challenge 2 - Who Have Published How Many At Where?
SELECT authors.au_id as 'AUTHOR ID', au_lname as 'LAST NAME', au_fname as 'FIRST NAME', pub_name as 'PUBLISHER', COUNT(titles.title) 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, pub_name;

#Challenge 3 - Best Selling Authors
SELECT authors.au_id as 'AUTHOR ID', au_lname as 'LAST NAME', au_fname as 'FIRST NAME', SUM(sales.qty) as TOTAL
FROM authors
JOIN titleauthor
ON authors.au_id= titleauthor.au_id
JOIN sales
ON titleauthor.title_id = sales.title_id
GROUP BY authors.au_id
ORDER BY TOTAL DESC
LIMIT 3;

#Challenge 4 - Best Selling Authors Ranking
SELECT authors.au_id as 'AUTHOR ID', au_lname as 'LAST NAME', au_fname as 'FIRST NAME', COALESCE(SUM(sales.qty), 0) as TOTAL
FROM authors
LEFT JOIN titleauthor
ON authors.au_id= titleauthor.au_id
LEFT JOIN sales
ON titleauthor.title_id = sales.title_id
GROUP BY authors.au_id
ORDER BY TOTAL DESC