I wanted to prepare a questionnaire to check SQL aptitude of candidates. The questionnaire should have questions at a medium level of proficiency in SQL. I checked over the Net, but the best I found was http://byteyourhead.blogspot.com/2009/06/technical-aptitude-questions-on-sql.html
. I needed some more questions. Are there any other online free SQL questionnaires that you can suggest?
Thanks in advance.