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Hi,

Remove pipe after sort.

my $query = 'find . -name \*.xls -exec dirname {} \; | sort -u | > list.txt';
system($query);

Why don't you use sort -u above and remove uniq ?

exec should be better than xargs.

Simple logic flaws -- test both options every time, or be careful which is first. You can leave out terms if the possibilities have been pruned. Ever study the karnaugh diagram of 4 bit logic...

Hi.

Also:
-s enables rudimentary switch parsing for switches on the command
line after the program name but before any filename arguments (or
before an argument of --). Any switch found there...

$
$ cat perl_getopt
#! /usr/bin/perl -w
use Getopt::Std;

our($opt_c, $opt_s, $opt_e);
getopt('c:s:e:');

if (defined($opt_c)) {print "option c is $opt_c \n";}
if (defined($opt_s)) {print...

Good spot :)

So your probably after


SELECT id, user FROM record WHERE time >= "12:00" AND time <= "12:30";

I think you need to add quotes:

select user, host from records where time between "12:00" and "12:30";

But that won't work either since the field "host" does not exist.