I am not a specialist on GUI design and programming, so I leave that to other Monks to comment upon, but I do work with databases and I find this code strange:

$queryHandle = $dbshop->prepare(" SELECT * FROM Department WHERE ( Ext
+  = '$copy_text' OR Mobile = '$copy_text' OR [E-Mail] = '$copy_text' 
+OR [Full Name] = '$copy_text' OR [Direct Number] = '$copy_text' ) ");
$queryHandle->execute()
             or die $DBI::errstr;
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You really should replace all instances of '$copy_text' with the placeholder ? and leave the quoting up to DBI/DBD. Your code is likely to fail if '$copy_text' contains a single quote somewhere in the string.

It also protects against SQL code injection. Your quoting is easily circumvented by putting something like

'); delete from Department;'
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(note all the single quotes!) in '$copy_text'.