perl中的DBI模块中的SQL错误

getitem44();  
sub getitem44()  
{  
$sqlquery = sprintf("select sum(f.expenditure)          
                     from funds f,ledger l      
                     where l.ledger_id in (select ledger_id from ledger  
                                           where upper(ledger_name) like 'MONOACQ%' and  
                                           substr(ledger_name,length(ledger_name)-4, 5) = '%s') and  
                                  f.ledger_id = l.ledger_id and  
                                  substr(f.funds_name, 1, instr(f.funds_name,',')-1) like '%e' ", $lastfiscyear);    
$sth = $dbh->prepare($sqlquery);  
$rc = $sth->execute;  
my $total = $sth->fetchrow_array;  
print "$totaln";  
}