Haven't gone through your code but here are a few tips

  1. Use DBI error messages to understand the problems, e.g. $sth = $dbh->prepare($query) || die $DBI::errstr or $sth->execute() or die $DBI::errstr
  2. Use debugger "perl -d"
  3. If you are not comfortable with debugger sometimes you can even use print statements to check the progress. Error in "prepare" will result in undefined statement handle
  4. And finally after you have done all above, if you are still not able to understand the problem try to put only part of the code where you actually see the problem

I hope the very first option will solve your problems


In reply to Re: Mysql update table problem by samarzone
in thread Mysql update table problem by jb22

Title:
Use:  <p> text here (a paragraph) </p>
and:  <code> code here </code>
to format your post, it's "PerlMonks-approved HTML":



  • Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!
  • Titles consisting of a single word are discouraged, and in most cases are disallowed outright.
  • Read Where should I post X? if you're not absolutely sure you're posting in the right place.
  • Please read these before you post! —
  • Posts may use any of the Perl Monks Approved HTML tags:
    a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr
  • You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)
            For:     Use:
    & &amp;
    < &lt;
    > &gt;
    [ &#91;
    ] &#93;
  • Link using PerlMonks shortcuts! What shortcuts can I use for linking?
  • See Writeup Formatting Tips and other pages linked from there for more info.