Subject: | Does LEFT JOIN work? |
When I try this query:
select mailto.email, vacant.email from mailto left join vacant on mailto.email = vacant.email WHERE vacant.email IS NULL
I get this error:
DBD::CSV::st execute failed: Use of uninitialized value $key_vals[0] in join or string at /home/njh/perl5/perlbrew/perls/perl-5.23.0/lib/site_perl/5.23.0/SQL/Statement.pm line 831, <GEN10> line 2.