Hi Perlmonks,

I am new at the Perl world and this is my first post and script

The below script generates .csv files corresponding to each executed query using DBI but, I am not happy with the code redundancy.

Had to search for some examples but didn't find anything. I would appreciate an example using a hash to understand how it works

Is there any nice way to do it?

Thanks in advance

# Create multiples csv file corresponding to each sql query
my $csvfile1 = "csvfile1.csv";
my $csvfile2 = "csvfile2.csv";
my $csvfile3 = "csvfile3.csv";



# DBI CONNECTION
my($dbh) = DBI->connect("dbi:Ingres:$dbname","$user","")
or die "Could not connect to database $dbname\n";

#tb1 select
my ($sth) = $dbh->prepare(SELECT * FROM tb1)
or die "Prepare failed: $DBI::errstr\n";

$sth->execute()
or die "Prepare failed: $DBI::errstr\n";

#create csvfile1 according to tb1 select
open my $fh, ">raw", $csvfile1 or die "$csvfile1: $!";
        $fh->print (join(",", @{$sth->{NAME}}), "\n"); #show header
        while (my @row = $sth->fetchrow_array())  
        {
            $fh->print (join(",", @row), "\n");
        };
    close $fh or die "$csvfile1: $!";
    
    $sth->finish();
    
    
#tb2 select    
my ($sth) = $dbh->prepare(SELECT * FROM tb2)
or die "Prepare failed: $DBI::errstr\n";

$sth->execute()
or die "Prepare failed: $DBI::errstr\n";

#create csvfile2 according to tb2 select
open my $fh, ">raw", $csvfile2 or die "$csvfile2: $!";
        $fh->print (join(",", @{$sth->{NAME}}), "\n"); #show header
        while (my @row = $sth->fetchrow_array())  
        {
            $fh->print (join(",", @row), "\n");
        };
    close $fh or die "$csvfile2: $!";
    
    $sth->finish();
    
    
#tb3 select   
my ($sth) = $dbh->prepare(SELECT * FROM tb3)
or die "Prepare failed: $DBI::errstr\n";

$sth->execute()
or die "Prepare failed: $DBI::errstr\n";

#create csvfile3 according to tb3 select
open my $fh, ">raw", $csvfile3 or die "$csvfile3: $!";
        $fh->print (join(",", @{$sth->{NAME}}), "\n"); #show header
        while (my @row = $sth->fetchrow_array())  
        {
            $fh->print (join(",", @row), "\n");
        };
    close $fh or die "$csvfile3: $!";
    
    $sth->finish();
    
    $dbh->disconnect();
[download]

---

---

Posts are HTML formatted. Put <p> </p> tags around your paragraphs. Put <code> </code> tags around your code and data!

Titles consisting of a single word are discouraged, and in most cases are disallowed outright.

Read Where should I post X? if you're not absolutely sure you're posting in the right place.

Please read these before you post! —

• How do I compose an effective node title?
• How do I post a question effectively?
• Markup in the Monastery

Posts may use any of the Perl Monks Approved HTML tags:

a, abbr, b, big, blockquote, br, caption, center, col, colgroup, dd, del, details, div, dl, dt, em, font, h1, h2, h3, h4, h5, h6, hr, i, ins, li, ol, p, pre, readmore, small, span, spoiler, strike, strong, sub, summary, sup, table, tbody, td, tfoot, th, thead, tr, tt, u, ul, wbr

You may need to use entities for some characters, as follows. (Exception: Within code tags, you can put the characters literally.)

	For:		Use:
	&		&
	<		&lt;
	>		&gt;
	[		&#91;
	]		&#93;

Link using PerlMonks shortcuts! What shortcuts can I use for linking?

See Writeup Formatting Tips and other pages linked from there for more info.