I'm trying to put the result of some queries in one big ash.

The data looks like this:

NR------E-mail----------Comment---------Dates-------------Age--Action_
+date
12------Tom@info.com----blablabla-------AM0,PM0,AM1,PM1---32---10-10-2
+001
13------Frank@info.com--blablabla-------AM0,PM0-----------45---10-10-2
+001
14------Sand@info.com---blablabla-------AM1,PM1,PM2-------47---10-10-2
+001
14------Sand@info.com---blablabla-------AM1,PM1,PM2-------47---12-10-2
+001

[download]

I was thinking of one hash, key would be NR. Value should be again an hash where E-mail,comment,age,dates are again keys with there actual value. The value of Dates would be again a hash were the keys to it would be the Action Date (see two times NR 14)

so %Arec{NR->%{E-mail->value,comment->value,age->value,dates->%{date1->date1,date2->date2,....}}}

I've managed to code this in my fetch loop: 

while (my $c = $st->fetchrow_hashref)
{
my %analyst_record;
$a_record{$c->{ANA_ID}}{e_mail}=$c->{EMAIL}};
$a_record{$c->{ANA_ID}}{Dates}{comment}=$c->{DETAIL};
$a_record{$c->{ANA_ID}}{Dates}{$c->{ACTION_DATE}}{$c->{AM_0}}=$c->{AM_
+0};
$a_record{$c->{ANA_ID}}{Dates}{$c->{ACTION_DATE}}{$c->{AM_1}}=$c->{AM_
+1};
$a_record{$c->{ANA_ID}}{Dates}{$c->{ACTION_DATE}}{$c->{AM_2}}=$c->{AM_
+2};
$a_record{$c->{ANA_ID}}{Dates}{$c->{ACTION_DATE}}{$c->{AM_3}}=$c->{AM_
+3};
$a_record{$c->{ANA_ID}}{Dates}{$c->{ACTION_DATE}}{$c->{AM_4}}=$c->{AM_
+4};

[download]

1)Is this the correct way to build my hash?( hashes in hashes?)
2)I want to call a subroutine with as parameter a reference to my NR hash, meaning I don't want to give the funtion not the reference of the Big hash.

I want for every NR to call that subroutine with only one parameter, the reference of the hash of THAT NR.

My current (not working) code: 

Show_analyst_row(\$analyst_record{$c->{ANA_ID}});


sub Show_analyst_row
{
my(%analyst_record) = %{@_};
print "$analyst_record{e_mail}\n";
}

[download]

This doesn't Work. How can you give the reference of an hash (this hash is actually the value in another hash) to a subroutine and how do you have to receive that reference-work with in the subroutine?

kind regards
Merlij

(Ps: many thanks to those who can help me, as you see at my question I'm a newbie into Perl. My only resource until now is "Programming Perl" from O'Reilly www.perl.com, do some of you have suggestions of other books should try? Thanks!)

2001-08-18 Edit by Corion : Added formatting, removed CODE tags around whole post.

In reply to References for subroutines to Hashes in Hashes :) by merlijn_u

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