SQL: Select rows with a column value that occurs at least N times?

Question

Suppose I have a SQL table \"Celebrities\" with two columns: \"fname\" and \"lname\":

fname    | lname    
---------+-------  
Bill     | Clinton
Bill     |          


        

Answer 1

SELECT fname, lname FROM Celebrities 
WHERE lname IN 
 (SELECT lname FROM Celebrities 
  GROUP BY lname HAVING COUNT (lname) >1)