As advised in your recent posts, you need to read the documentation. In this instance DBIx::Class and DBIx::Class::ResultSet. You were given this advice most recently a couple of hours ago Re^3: Database mySQL and some days ago Re: Database MySQL Perl. Continuing to ignore advice when asking for help isn't a wise strategy.

You have posted several questions relating to DBIx::Class, but the post titles you give aren't great, and you don't mention DBIx::Class at all. How do I compose an effective node title? and How do I post a question effectively? have good advice on this. When asking for help it's best to make it as easy as possible for people to provide help. I suggest you take the time to read and understand the following:

In reply to Re: MySQL undef by marto
in thread MySQL undef by akagrawal3

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.