Solved

Installing the DBI Module

Posted on 2002-05-10
6
127 Views
Last Modified: 2013-12-25
How to?
0
Comment
Question by:lexxwern
  • 3
  • 3
6 Comments
 
LVL 6

Accepted Solution

by:
andreif earned 100 total points
ID: 7002341
perl -MCPAN -e"install DBI"
0
 
LVL 12

Author Comment

by:lexxwern
ID: 7003069
ok i did install it, about.com, but anyway thanks to andreif for effort too.

anyway now a little change in the Q;

can im looking for a simple example, where tables are created and values written and read.

thanks...
0
 
LVL 6

Expert Comment

by:andreif
ID: 7003560
it depends on database, this example is for MySQL and queries can be not working with other databases. Anyway DBI module interface is the same.

use DBI;

# connect to DB
$dbh = DBI->connect ("DBI:mysql:database=$db",$user,$passwd) or die $DBI::errstr;

# create table
$sql = "
CREATE TABLE blocked_emails (
  email varchar(100)
)
";
$dbh->do($sql) or print $DBI::errstr;

# insert records
$sql = "insert into blocked_emails (email) values (?)";
$sth = $dbh->prepare($sql) or print $DBI::errstr;

$sth->execute("test@email.com") or print $DBI::errstr;
$sth->execute("test2@email.com") or print $DBI::errstr;

$sth->finish;


# select records
$sql = "select * from blocked_emails";
$sth = $dbh->prepare($sql) or print $DBI::errstr;
while ($record = $sth->fetchrow_hashref) {
  print "$$record{email}<br>";
}
$sth->finish;
0
Master Your Team's Linux and Cloud Stack!

The average business loses $13.5M per year to ineffective training (per 1,000 employees). Keep ahead of the competition and combine in-person quality with online cost and flexibility by training with Linux Academy.

 
LVL 12

Author Comment

by:lexxwern
ID: 7004019
thanks andreif,

yes i use mysql, sorry for not letting you know earlier.

your examples were quite useful. a small doubt.


suppose a select returns more than one value, then how can it be written into arrays in one go.... or will i have to get data rowwise?
0
 
LVL 6

Expert Comment

by:andreif
ID: 7005331
Yes, you can use "fetchall_arrayref"

$tbl_ary_ref = $sth->fetchall_arrayref;

The fetchall_arrayref method can be used to fetch all the data to be returned from a prepared and executed statement handle. It returns a reference to an array that contains one reference per row.

This link can be useful for you:

http://www.mysql.com/doc/P/e/Perl_DBI_Class.html
0
 
LVL 12

Author Comment

by:lexxwern
ID: 7005334
Thankyou for the accurate help and the good link.
0

Featured Post

Free Tool: ZipGrep

ZipGrep is a utility that can list and search zip (.war, .ear, .jar, etc) archives for text patterns, without the need to extract the archive's contents.

One of a set of tools we're offering as a way to say thank you for being a part of the community.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

In this tutorial I will focus on how to use WhizBase as a tool for sending ICQ messages to ICQ. Here I will use a new technology in WhizBase, published in WhizBase 5.1 version. In this tutorial I will use 3 files, pager.wbsp for the processing, e…
This tutorial will discuss fancy secure registration forms, with AJAX technology support. In this article I assume you already know HTML and some JS. I will write the code using WhizBase Server Pages, so you need to know some basics in WBSP (you mig…
Learn the basics of strings in Python: declaration, operations, indices, and slicing. Strings are declared with quotations; for example: s = "string": Strings are immutable.: Strings may be concatenated or multiplied using the addition and multiplic…
Learn the basics of while and for loops in Python.  while loops are used for testing while, or until, a condition is met: The structure of a while loop is as follows:     while <condition>:         do something         repeate: The break statement m…

856 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question