Beefy Boxes and Bandwidth Generously Provided by pair Networks
Pathologically Eclectic Rubbish Lister
 
PerlMonks  

comment on

( [id://3333]=superdoc: print w/replies, xml ) Need Help??
Try something like this:

my $table = 'book'; my $condition = '1'; my $sort_field = 'id'; my $sort_order = 'DESC"; my $sql = "SELECT id, name, location FROM $table WHERE $condition ORDE +R BY $sort_field $sort_order"; print $sql,"\n"; my $sth = $dbh->prepare($sql); $sth->execute() or warn "Unable to query $table" $dbh->errstr . "\n" . + $!; while (my $row = $sth->fetchrow_hashref()) { print $row->{'id'},"\t",$row->{'name'},"\t",$row->{'location'},"\n"; +; }
Remember: single quotes give you a literal, double quotes interpolates included variables. Also, if this is untrusted user input you are manipulating (say the kind collected at a browser) you would be much safer to use bind variables, by replacing these two lines like so:

my $sql = "SELECT id, name, location FROM $table WHERE ? ORDER BY ? ?" +; . . . $sth->execute($condition,$sort_field,$sort_order);
Note: I've never tried to feed a $sort_order as a bind variable and have no idea if that would work. But a few tests ought to let you know if it will. I do know that the rest of this should work, although I have not tested this code, leaving that to you.

-- Hugh

if( $lal && $lol ) { $life++; }

In reply to Re: Using variables within a mysql query by hesco
in thread Using variables within a mysql query by sulfericacid

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



  • Are you posting in the right place? Check out Where do I post X? to know for sure.
  • Posts may use any of the Perl Monks Approved HTML tags. Currently these include the following:
    <code> <a> <b> <big> <blockquote> <br /> <dd> <dl> <dt> <em> <font> <h1> <h2> <h3> <h4> <h5> <h6> <hr /> <i> <li> <nbsp> <ol> <p> <small> <strike> <strong> <sub> <sup> <table> <td> <th> <tr> <tt> <u> <ul>
  • Snippets of code should be wrapped in <code> tags not <pre> tags. In fact, <pre> tags should generally be avoided. If they must be used, extreme care should be taken to ensure that their contents do not have long lines (<70 chars), in order to prevent horizontal scrolling (and possible janitor intervention).
  • Want more info? How to link or How to display code and escape characters are good places to start.
Log In?
Username:
Password:

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

How do I use this?Last hourOther CB clients
Other Users?
Others sharing their wisdom with the Monastery: (9)
As of 2024-03-28 12:24 GMT
Sections?
Information?
Find Nodes?
Leftovers?
    Voting Booth?

    No recent polls found