$dbh =
DBI->connect("DBI:mysql:database=$database;host=$host","$user","$mysqlpassword",{'RaiseError'=>1});
$update_number = "UPDATE $table set total_clicked = total_clicked + 1";
$sth = $dbh->prepare("$update_number");
if (!$sth) { die "Error:" . $dbh->errstr . "\n"; }
if (!$sth->execute) { die "Error:" . $sth->errstr . "\n"; }
--Greg Johnson
-----Original Message-----
From: rory oconnor [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, March 20, 2002 10:44 AM
To: [EMAIL PROTECTED]
Subject: fast,efficient query for counting
I'm setting up some tracking stats for (opt-in) e-mail campaigns, and
one of the things I'm tracking is click-thrus. I'm going to re-direct
traffic thru a script that will just count the number of clicks, and
store that number in a mysql table.
It needs to be fast and efficient, and I'm somewhat of a mysql newbie,
so I was wonderinf if there is any more efficient way to simply add a
number to the existing number in that table with mysql and perl. My way
seems like a lot of code to do a little task. Any help is appreciated!
# set up the db connection and SQL
$dbh =
DBI->connect("DBI:mysql:database=$database;host=$host","$user","$mysqlpassword",{'RaiseError'=>1});
$select_number = "select total_clicked from $table";
# actually execute the checking query
$sth = $dbh->prepare("$select_number");
if (!$sth) { die "Error:" . $dbh->errstr . "\n"; }
if (!$sth->execute) { die "Error:" . $sth->errstr . "\n"; }
# loop thru the query and set the result variables
while (my $ref = $sth->fetchrow_arrayref) {
$total_clicked = $$ref[0];
}
# add 1 to total_clicked
$total_clicked=$total_clicked+1;
# update the number
$update_number = "UPDATE $table set total_clicked = $total_clicked";
# actually execute the update query
$sth = $dbh->prepare("$update_number");
if (!$sth) { die "Error:" . $dbh->errstr . "\n"; }
if (!$sth->execute) { die "Error:" . $sth->errstr . "\n"; }
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