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Returning a single value from resultset in Perl DBI

Posted on 2009-07-01
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1,390 Views
Last Modified: 2012-05-07
My result set is going to return only one value from the database. I am connecting to the DB using perl dbi. How shd i fetch the value? Please advise.
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Question by:saibsk
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Carl Bohman earned 500 total points
ID: 24757874
Something like this should work (untested)
use DBI;
 
my $dbh = DBI->connect(...) or die "Couldn't connect to database: " . DBI->errstr;
my $sth = $dbh->prepare(...) or die "Couldn't prepare statement: " . $dbh->errstr;
$sth->execute() or die "Couldn't execute statement: " . $sth->errstr;
($sth->rows > 0) or die "No rows matched.";
 
my $Data = ($sth->fetchrow_array())[0];
 
$sth->finish;
$dbh->disconnect;

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Expert Comment

by:michaelshavel
ID: 24761994
Do you have some code that you've already tried but doesn't work? If so, post it here please.

Mike
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Expert Comment

by:Adam314
ID: 24787114
You can use prepare/exectue/fetch as shown by bounsy, or you can just use one of the selectrow methods, which does all of these at once.
#Get data as array
my @record = $dbh->selectrow_array('SELECT ....');
 
#Get data as arrayref
my $record = $dbh->selectrow_arrayref('SELECT ....');
 
#Get data as hashref
my $record = $dbh->selectrow_hashref('SELECT ....');

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