Beefy Boxes and Bandwidth Generously Provided by pair Networks
There's more than one way to do things

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
Hi Monks,

I'm trying to see if I can run 2 commands in 1 with Perl's DBI module.  Here's my code:

$dbh->do("UPDATE person SET nickname = 'one' WHERE id=1") or die "Coul +d not execute #1: $DBI::errstr\n"; $dbh->do("UPDATE person SET nickname = 'two' WHERE id=1; UPDATE person + SET nickname = 'three' WHERE id=1") or die "Could not execute #2: $D +BI::errstr\n";
The output is: "Could not execute #2: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'UPDATE person SET nickname = 'three' WHERE id=1' at line 1"

The result is, nickname ends up being = 'one'.


1. If the error is with setting nickname = 'three', then why doesn't nickname end up being = 'two'?

2. Does DBI allow multiple SQL statements to be run in one invocation?  If so, how can that be done?

3. Or if not, why not? Is it to help prevent SQL injection, perhaps?  That's fine, as that's the reason for my test, but I'd like to see how to make it happen before I see if my methods of prevention are working.


In reply to Multiple SQL statements in DBI by tel2

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, 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, 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.
  • Log In?

    What's my password?
    Create A New User
    and all is quiet...

    How do I use this? | Other CB clients
    Other Users?
    Others romping around the Monastery: (5)
    As of 2018-06-24 03:35 GMT
    Find Nodes?
      Voting Booth?
      Should cpanminus be part of the standard Perl release?

      Results (126 votes). Check out past polls.