in reply to Problem with mysql query using DBI::Mysql

To start with, use strict; and Perl will tell you that $estado is never initialized.

Next, your while-loop does not print anything.

Finally, use placeholders in your SQL. That will protect you against a lot of evil.

CountZero

A program should be light and agile, its subroutines connected like a string of pearls. The spirit and intent of the program should be retained throughout. There should be neither too little or too much, neither needless loops nor useless variables, neither lack of structure nor overwhelming rigidity." - The Tao of Programming, 4.1 - Geoffrey James

In Section Seekers of Perl Wisdom