This results in the error:

The code you posted does not result in that error

I don't understand what this means or what I need to do to fix it

If you're going to be using strict (and you should), you should read perldoc strict and Why you should use strict, 101 reasons to use strict;...

In short 

$ perl -Mdiagnostics -Mstrict -e " my $f = 'asdf'; $$f{3}++;
Can't use string ("asdf") as a HASH ref while "strict refs" in use at 
+-e line 1 (#1)
    (F) Only hard references are allowed by "strict refs".  Symbolic
    references are disallowed.  See perlref.

Uncaught exception from user code:
        Can't use string ("asdf") as a HASH ref while "strict refs" in
+ use at -e line 1.
 at -e line 1

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In reply to Re: SQL::Abstract 'between' clause (about done) by Anonymous Monk
in thread SQL::Abstract 'between' clause (about done) by Anonymous Monk

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