Program Listings

Listings 4-1 to 4-9 show the complete code for the programs in the chapter.

Listing 4-1: select.pl

start example
01: #!/usr/bin/perl -w 02: # 03: # select1.pl 04: # Chapter 4 05: # Listing 4-1 06: # 07: use strict; 08: use DBI; 09: my $dbh = DBI->connect ("DBI:mysql:BibleBook","bookuser","testpass")  10:     or die("Cannot connect: $DBI::errstr"); 11: my $sql = qq(SELECT * FROM library); 12: my $sth = $dbh->prepare($sql); 13: $sth->execute; 14: my $counter = 1; 15: while(my $record = $sth->fetch){ 16:     print "$counter: "; 17:     for my $field (@$record){ 18:         print "$field - "; 19:     } 20:     $counter++; 21:     print "\n\n"; 22: }
end example

Listing 4-2: select2.pl

start example
01: #!/usr/bin/perl -w 02: # 03: # select2.pl 04: # Chapter 4 05: # Listing 4-2 06: #  07: use strict; 08: use DBI; 09: my $dbh = DBI->connect ("DBI:mysql:BibleBook","bookuser","testpass")  10:     or die("Cannot connect: $DBI::errstr"); 11: my $sql = qq(SELECT * FROM library WHERE isbn = ‘1565924347'); 12: my $sth = $dbh->prepare($sql); 13: $sth->execute; 14: while(my $record = $sth->fetch){ 15:     for my $field (@$record){ 16:         print "$field\n"; 17:     } 18:     print "\n\n"; 19: }
end example

Listing 4-3: select3.pl

start example
01: #!/usr/bin/perl -w 02: # 03: # select3.pl 04: # Chapter 4 05: # Listing 4-3 06: # 07: use strict; 08: use DBI; 09: my $dbh = DBI->connect ("DBI:mysql:BibleBook","bookuser","testpass")  10:     or die("Cannot connect: $DBI::errstr"); 11: my $sql = qq(SELECT * FROM library ORDER BY publisher); 12: my $sth = $dbh->prepare($sql); 13: $sth->execute; 14: my $counter = 1; 15: while(my $record = $sth->fetch){ 16:     print "Book #$counter:\n"; 17:     for my $field (@$record){ 18:         print "$field\n"; 19:     } 20:     $counter++; 21:     print "\n"; 22: }
end example

Listing 4-4: select4.pl

start example
01: #!/usr/bin/perl -w 02: # 03: # select4.pl 04: # Chapter 4 05: # Listing 4-4 06: # 07: use strict; 08: use DBI; 09: my $dbh = DBI->connect ("DBI:mysql:BibleBook","bookuser","testpass")  10:     or die("Cannot connect: $DBI::errstr"); 11: my $sql = qq(SELECT COUNT(*) FROM library); 12: my $sth = $dbh->prepare($sql); 13: $sth->execute; 14: while(my $record = $sth->fetch){ 15:     print "You have $record->[0] books."; 16:     print "\n"; 17: }
end example

Listing 4-5: select5.pl

start example
01: #!/usr/bin/perl -w 02: # 03: # select5.pl 04: # Chapter 4 05: # Listing 4-5 06: # 07: use strict; 08: use DBI; 09: my $dbh = DBI->connect ("DBI:mysql:BibleBook","bookuser","testpass")  10:     or die("Cannot connect: $DBI::errstr"); 11: my $sql = qq(SELECT COUNT(*), publisher FROM library GROUP BY publisher); 12: my $sth = $dbh->prepare($sql); 13: $sth->execute; 14: while(my $record = $sth->fetch){ 15:     for my $field (@$record){ 16:         print "$field "; 17:     } 18:     print "\n"; 19: }
end example

Listing 4-6: select6.pl

start example
01: #!/usr/bin/perl -w 02: # 03: # select6.pl 04: # Chapter 4 05: # Listing 4-6 06: # 07: use strict; 08: use DBI; 09: my $dbh = DBI->connect ("DBI:mysql:BibleBook","bookuser","testpass")  10:     or die("Cannot connect: $DBI::errstr"); 11: my $sql = qq(SELECT isbn, price, title FROM library); 12: my $sth = $dbh->prepare($sql); 13: $sth->execute; 14: while(my @array = $sth->fetchrow_array){ 15:     no warnings; 16:     my $index = 0; 17:     for my $data (@array){ 18:         print "\$array[$index] contains $data\n"; 19:         $index++; 20:     } 21:     print "\n"; 22: }
end example

Listing 4-7: select7.pl

start example
01: #!/usr/bin/perl -w 02: # 03: # select7.pl 04: # Chapter 4 05: # Listing 4-7 06: # 07: use strict; 08: use DBI; 09: my $dbh = DBI->connect  ("DBI:mysql:BibleBook","bookuser","testpass")  10:     or die("Cannot connect: $DBI::errstr"); 11: my $sql = qq(SELECT * FROM library); 12: my $sth = $dbh->prepare($sql); 13: $sth->execute; 14: my $ref = $sth->fetchall_arrayref; 15: my $record_idx = 0; 16: for my $rec (@$ref){ 17:     no warnings; 18:     my $field_idx = 0; 19:     for my $field (@$rec){ 20:         print "ref[$record_idx][$field_idx] = $field\n"; 21:         $field_idx++; 22:     } 23:     $record_idx++; 24:     print "\n"; 25: } 26: print "\n"; 27: print "$ref->[57][1]\n\n";
end example

Listing 4-8: select8.pl

start example
01: #!/usr/bin/perl -w 02: # 03: # select8.pl 04: # Chapter 4 05: # Listing 4-8 06: # 07: use strict; 08: use DBI; 09: my $dbh = DBI->connect ("DBI:mysql:BibleBook","bookuser","testpass")  10:     or die("Cannot connect: $DBI::errstr"); 11: my $sql = qq(SELECT * FROM library); 12: my $sth = $dbh->prepare($sql); 13: $sth->execute; 14: my $counter = 1; 15: while(my $record = $sth->fetchrow_hashref){ 16:     no warnings; 17:     print "Book #$counter\n"; 18:     print "Title:     $record->{title}\n"; 19:     print "Author:    $record->{author}\n"; 20:     print "Publisher: $record->{publisher}\n"; 21:     print "Cost:      $record->{price}\n"; 22:     print "\n"; 23:     $counter++; 24: }
end example

Listing 4-9: select9.pl

start example
01: #!/usr/bin/perl -w 02: # 03: # select8.pl 04: # Chapter 4 05: # Listing 4-9 06: # 07: use strict; 08: use DBI; 09: my $dbh = DBI->connect ("DBI:mysql:BibleBook","bookuser","testpass")  10:     or die("Cannot connect: $DBI::errstr"); 11: my $sql = qq(SELECT * FROM library); 12: my $sth = $dbh->prepare($sql); 13: $sth->execute; 14: my $counter = 1; 15: while(my $record = $sth->fetchrow_hashref){ 16:     for my $field (keys %$record){ 17:         $record->{$field} = "N/A" unless $record->{$field}; 18:         $record->{$field} =~ s/^\W+//; 19:         $record->{$field} =~ s/\015?\012//g; 20:     } 21:     print "Book #$counter\n"; 22:     print "Title:     $record->{title}\n"; 23:     print "Author:    $record->{author}\n"; 24:     print "Publisher: $record->{publisher}\n"; 25:     print "ISBN:      $record->{isbn}\n"; 26:     print "Cost:      $record->{price}\n"; 27:     print "Pub Date:  $record->{pubdate}\n"; 28:     print "\n"; 29:     $counter++; 30: }
end example



Perl Database Programming
Perl Database Programming
ISBN: 0764549561
EAN: 2147483647
Year: 2001
Pages: 175

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