Question

I am trying to create a query that will list all books by the same author. Most of the list has only one book by one author, but I want the author that has multiple books listed in db to display those book for that author.

I have two tables:

• Book – AuthorID, BkTitle, etc
• Author – AuthorID, AuthFName, AuthLName

I want the result to be sorted by AuthLName and the report to consist of any books in db that have same authorid.

Example result wanted:

 AUTHORID BKTITLE           AUTHFNAME     AUTHLNAME
--------- ----------------- ------------  -----------
    504   KNIGHT FREEDOM     Chris        Feehan
    504   KNIGHT SHOWDOWN    Chris        Feehan

Currently, I have the following code:

select AUTHORID, BKTITLE
from BOOK 
where AUTHORID in
    (select AUTHORID from
       (select AUTHORID, 
               count(*) as BOOK_COUNT
        from BOOK
        group by AUTHORid
        order by AUTHORid )
     where BOOK_COUNT >= 2);

which gives:

  AUTHORID BKTITLE
---------- --------------------
       504 KNIGHT FREEDOM
       504 KNIGHT SHOWDOWN

I need to find a way to get the information from the Author Table and add it in this.

Answer 1

This should do:

SELECT b.AUTHORID, b.BKTITLE, a.AUTHFNAME, a.AUTHLNAME
FROM BOOK b
  INNER JOIN AUTHOR a
    ON b.AUTHORID = a.AUTHORID
AND b.AUTHORID IN
(
  SELECT AUTHORID
  FROM BOOK
  GROUP BY AUTHORID
  HAVING COUNT(AUTHORID) > 1
)
ORDER BY a.AUTHLNAME, a.AUTHFNAME