my $SQLquery = "
	SELECT checklist.id 
	FROM group_management, User_group_management_mapping, profiles, checklist,checklist_group_mapping 
	WHERE User_group_management_mapping.userid = ? 
	and  profiles.userid = User_group_management_mapping.userid 
	and group_management.id = User_group_management_mapping.groupid 
	and checklist_group_mapping.checklist_id = checklist.id
	and checklist_group_mapping.group_id = group_management.id";

my $sth = $dbh->prepare( $SQLquery );
$sth->execute( $usr );