Sometimes we need to get bits of data from databases. And one of the quick
ways to do this is pass an SQL query to Mysql or Postgresql without loading
up the special database specific (or not) Julia libraries. Backticks work
well up to a point.
For example `psql $opts -c $sql` works nicely if $opts is an array of
strings where there is no space between flag and value, as in
["-hlocalhost","..."] to indicate which server to access. It has to be an
array, a simple string does not fly since it is inserted with wrapping
quotes intact. The $sql can be a string, which is nice.
I find I can pass pretty much any option in $opts but have hit a roadblock
when trying to pass an output option such as "--pset="footer=off" at which
point I seem to lose control of the quotes again. It's not a blocker since
I can just adjust the result once it has been returned. Just interested to
know if there is a workaround.
