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[lab-mysql-select]Alexandre Garanhao #200

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73 changes: 73 additions & 0 deletions your-code/solution.sql
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Original file line number Diff line number Diff line change
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# CHALLENGE 1

SELECT *
FROM publications.authors;

SELECT *
FROM publications.titles;

SELECT *
FROM publications.titleauthor;

SELECT *
FROM publications.publishers;



SELECT
author_id as Author_ID, Last_name, First_name, title AS Title, publications.publishers.pub_name AS Publisher
FROM (
SELECT author_title AS author_id, au_lname AS Last_name, au_fname AS First_name, title_author AS Title_id, pub_id AS publisher_author, title
FROM (
SELECT publications.titleauthor.au_id AS author_title, publications.titleauthor.title_id AS title_author, pub_id, publications.titles.title
FROM publications.titleauthor
INNER JOIN publications.titles
ON publications.titles.title_id = publications.titleauthor.title_id
) AS selection
INNER JOIN publications.authors
ON publications.authors.au_id = selection.author_title
) AS selection2
INNER JOIN publications.publishers
ON selection2.publisher_author = publications.publishers.pub_id;


# CHALLENGE 2

SELECT author_id AS Author_ID, Last_name, First_name, publications.publishers.pub_name AS Publisher, COUNT(title)
FROM (
SELECT author_title AS author_id, au_lname AS Last_name, au_fname AS First_name, title_author AS Title_id, pub_id AS publisher_author, title
FROM (
SELECT publications.titleauthor.au_id AS author_title, publications.titleauthor.title_id AS title_author, pub_id, publications.titles.title
FROM publications.titleauthor
INNER JOIN publications.titles
ON publications.titles.title_id = publications.titleauthor.title_id
) AS selection
INNER JOIN publications.authors
ON publications.authors.au_id = selection.author_title
) AS selection2
INNER JOIN publications.publishers
ON selection2.publisher_author = publications.publishers.pub_id
GROUP BY Author_ID, Publisher
ORDER BY Author_ID DESC;


# CHALLENGE 3


SELECT author_id AS Author_ID, Last_name, First_name, COUNT(title) AS titles_sold
FROM (
SELECT author_title AS author_id, au_lname AS Last_name, au_fname AS First_name, title_author AS Title_id, pub_id AS publisher_author, title
FROM(
SELECT publications.titleauthor.au_id AS author_title, publications.titleauthor.title_id AS title_author, pub_id, publications.titles.title
FROM publications.titleauthor
INNER JOIN publications.titles
ON publications.titles.title_id = publications.titleauthor.title_id
) AS selection
INNER JOIN publications.authors
ON publications.authors.au_id = selection.author_title
) AS selection2
INNER JOIN publications.publishers
ON selection2.publisher_author = publications.publishers.pub_id
GROUP BY Author_ID
ORDER BY Author_ID DESC
LIMIT 3;