Beefy Boxes and Bandwidth Generously Provided by pair Networks
laziness, impatience, and hubris
 
PerlMonks  

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'.

Questions:

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.

Thanks.
tel2


In reply to Multiple SQL statements in DBI by tel2

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!
  • 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
  • Outside of code tags, you may need to use entities for some characters:
            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?
    Username:
    Password:

    What's my password?
    Create A New User
    Chatterbox?
    and the web crawler heard nothing...

    How do I use this? | Other CB clients
    Other Users?
    Others examining the Monastery: (4)
    As of 2014-12-28 22:44 GMT
    Sections?
    Information?
    Find Nodes?
    Leftovers?
      Voting Booth?

      Is guessing a good strategy for surviving in the IT business?





      Results (183 votes), past polls