Low standards for SQL

http://jobs.perl.org/job/9236 says:

* Experience working with SQL databases such as MySQL. You can do  
multi-table joins in your head and know the difference between inner  
and outer joins.

Is that really such a big deal to find?  Are multi-table joins, and  
the difference between inner & outer joins, that difficult for  
programmers to understand that they must be specified in a job ad?

xoxo,
Andy

--
Andy Lester => [email protected] => www.petdance.com => AIM:petdance