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perl apostrophe problem

Last Modified: 2012-05-06
I have a perl function that runs a sql statement.  I think there is an error due to an extra apostrophe, can someone please show me how to make this safe?

sub updateDB
($Subject, $SubmitTime, $CompletionTime, $Status, $TransactionID) = @_ ;

$sql = "UPDATE tracker set SubmitTime = '$SubmitTime',CompletionTime = '$CompletionTime',Status = '$Status',SubmitTime = '$SubmitTime' where orderid ='" . $Subject . "'";
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