<?php
global $wpdb;
$tablename = $wpdb->prefix . 'fictizia_clientes';
$charset_collate = '';
if ( ! empty($wpdb->charset) )
$charset_collate = "DEFAULT CHARACTER SET $wpdb->charset";
if ( ! empty($wpdb->collate) )
$charset_collate .= " COLLATE $wpdb->collate";
$sql = "CREATE TABLE IF NOT EXISTS $tablename (
`ID` bigint(20) NOT NULL auto_increment,
`nombre_cliente` varchar(200) DEFAULT '',
PRIMARY KEY (ID),
KEY nombre_cliente (nombre_cliente)
) $charset_collate";
require_once(ABSPATH . 'wp-admin/includes/upgrade.php');
dbDelta($sql);