Beefy Boxes and Bandwidth Generously Provided by pair Networks
Your skill will accomplish
what the force of many cannot

Comment on

( #3333=superdoc: print w/replies, xml ) Need Help??
This is a tad late and perhaps superfluous, but why are you bothering with all this dynamic sql and so on? When you execute an update in mysql it only changes the columns you specify, yes? So just leave all the other fields blank and let the database handle it. Eg, assuming you have a hash with the key being the column name and the value being the, uh, value, then just do something like:
my $sql='UPDATE table SET '.join',',map {"$_=".quote($hash{$_})} keys +%hash;
Then, in your example, you just end up with sql looking like:
UPDATE table SET phone='456'
Obviously you need a where statement and so on, but thats simple. This way you only touch the fields you want to change and you don't need to worry about restoring the old values and fun stuff like that. The only problem I see is if they wanted to submit say, an empty field and not update the value which would probably require something slightly more complicated then a nice map, but perhaps you could chain maps:
map {"$_=".quote($hash{$_})} grep defined $hash{$_},keys %hash;

In reply to Re: How to get a placeholder to keep the current column value? by BUU
in thread How to get a placeholder to keep the current column value? by liz

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 having an uproarious good time at the Monastery: (9)
    As of 2018-05-24 08:03 GMT
    Find Nodes?
      Voting Booth?