Skip navigation

Tag Archives: just wanted to say

*’Cause I have a feeling there’s more to come

I just spent an hour or so figuring out why a long SQL query is returning 0 rows. Long as in,

SELECT books.isbn, title, lastname, firstname, publishername
FROM books
INNER JOIN authored ON books.isbn = authored.isbn
INNER JOIN bookpersons ON authored.personid = bookpersons.personid
INNER JOIN published ON published.isbn = books.isbn
INNER JOIN publishers ON published.publisherid = publishers.publisherid
WHERE title = "Brave New World";

I was already looking into derived relations and subqueries until I realized that tables published and publishers are empty.

I’m calling it a day. So much for populating published and publishers and testing if my query works. Haaaayyyy… OTL