Re^3: Global symbol "$prepare" requires explicit package name

In addition to what poj said, instead of

$sth2 = $dbh->prepare("update $what$ever");
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to see what's going on, write

my $sqltext = "update $what$ever";
print qq(SQL query is: "$sqltext");
$sth2 = $dbh->prepare($sqltext);
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Perhaps there's a stray question mark in your $date_new