installer.php

<?php
if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

global $wpdb;

$wpdb->hide_errors();

$collate = '';

if ( $wpdb->has_cap( 'collation' ) ) {
	$collate = $wpdb->get_charset_collate();
}

require_once( ABSPATH . 'wp-admin/includes/upgrade.php' );

// Table for storing table rates themselves. shipping_method_id is an individual table of rates applied to a zone
$sql = "
CREATE TABLE {$wpdb->prefix}woocommerce_shipping_table_rates (
rate_id bigint(20) NOT NULL auto_increment,
rate_class varchar(200) NOT NULL,
rate_condition varchar(200) NOT NULL,
rate_min varchar(200) NOT NULL,
rate_max varchar(200) NOT NULL,
rate_cost varchar(200) NOT NULL,
rate_cost_per_item varchar(200) NOT NULL,
rate_cost_per_weight_unit varchar(200) NOT NULL,
rate_cost_percent varchar(200) NOT NULL,
rate_label longtext NULL,
rate_priority int(1) NOT NULL,
rate_order bigint(20) NOT NULL,
shipping_method_id bigint(20) NOT NULL,
rate_abort int(1) NOT NULL,
rate_abort_reason longtext NULL,
PRIMARY KEY  (rate_id)
) $collate;
";
dbDelta( $sql );

if ( version_compare( WC_VERSION, '2.6.0', '<' ) ) {
// Table for storing shipping zones
$sql = "
CREATE TABLE {$wpdb->prefix}woocommerce_shipping_zones (
zone_id bigint(20) NOT NULL auto_increment,
zone_name varchar(255) NOT NULL,
zone_enabled int(1) NOT NULL DEFAULT 1,
zone_type varchar(40) NOT NULL DEFAULT '',
zone_order bigint(20) NOT NULL,
PRIMARY KEY  (zone_id)
) $collate;
";
dbDelta( $sql );

// Table for storing a shipping zones locations which it applies to. Type can be postcode, state, or country.
$sql = "
CREATE TABLE {$wpdb->prefix}woocommerce_shipping_zone_locations (
location_id bigint(20) NOT NULL auto_increment,
location_code varchar(255) NOT NULL,
zone_id bigint(20) NOT NULL,
location_type varchar(40) NOT NULL,
PRIMARY KEY  (location_id)
) $collate;
";
dbDelta( $sql );

// Table for storing shipping zones individial shipping methods and their options
$sql = "
CREATE TABLE {$wpdb->prefix}woocommerce_shipping_zone_shipping_methods (
shipping_method_id bigint(20) NOT NULL auto_increment,
shipping_method_type varchar(255) NOT NULL,
zone_id bigint(20) NOT NULL,
shipping_method_order bigint(20) NOT NULL default 0,
PRIMARY KEY  (shipping_method_id)
) $collate;
";
dbDelta( $sql );
}

update_option( 'hide_table_rate_welcome_notice', '' );