# 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();