OK, tried with 'exec' but errored out:
<code>
Can't locate object method "exec" via package "DBI::db" ...
</code>
So tried 'system' like this:
<code>
system("$dbh=PRAGMA case_sensitive_like = 1;");
</code>
This does not present any errors, but also still showed ALL results beginning with 'D' or 'd'.
I think we are on the right track though. Thank you for taking time for this.