Computers and Technology, 15.10.2020 08:01 nickykardashian
Consider the following relations containing information about authors, articles and which author authored which papers (a paper can have several co-authors):
Author(authorID, name)
Authoring(articleID, authorID)
Article(articleID, title, venue, year, month)
Express the following queries in Algebra
a. List the articles authored by John Smith
b. List the co-authors of John Smith (authors who co-authored an article with John Smith)
c. List all the articles published last year
d. List pairs of articles that have the same titles with different article IDs
e. List the authors with no article in the database
f. List the authors who have all their papers co-authored with John Smith
g. List the papers authored by only one author (without aggregate functions)
h. Which author co-authored at least 1 paper with every author (without aggregate functions)
i. List the authors who have all their papers co-authored only with John Smith (No other co-author)
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