Answer to Question #314822 in Databases | SQL | Oracle | MS Access for Abu Sayed

Question

Consider the relations Authors(auID,name) and Authoring(articleID,authorID), containing information on names of authors, and who is authoring which papers, respectively. i) Write an SQL query that returns for each article, its ID, title and the number of authors. ii) Write an SQL query that returns the titles of articles authored by 'Robert Tarjan'. iii) Write an SQL query that returns the number of co-authors of 'Robert Tarjan'. (I.e., the number of authors who have written at least one article together with him.)

Answer 1

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