我有这个功能，可以在激活插件时创建两个表。只创建wp\\u wpt\\u stats表，而不创建wp\\u wpt\\u列表。我知道dbdelta很挑剔，但我看不出我做错了什么。

global $wpt_db_version;
$wpt_db_version = "1.0";

function wpt_install() {
    global $wpdb;
    global $wpt_db_version;

    $table_add_toplist = $wpdb->prefix . \'wpt_list\';
    $table_add_wptstats = $wpdb->prefix . \'wpt_stats\';
    $charset_collate = $wpdb->get_charset_collate();

    //-----------------------table_one-----------------------------------
        if($wpdb->get_var(\'SHOW TABLES LIKE \' . $table_add_toplist) != $table_add_toplist){
      $sql_one = \'CREATE TABLE \' . $table_add_toplist . \'(
          id INT(11) UNSIGNED AUTO_INCREMENT,
          link_id INT(11),
          visitor_ip VARCHAR(15)
          click_at DATETIME NOT NULL,
          site_votes INT(11),
          on_page VARCHAR(255),
          UNIQUE KEY id (id)
    ) \'. $charset_collate .\';\';


    require_once(ABSPATH . \'wp-admin/includes/upgrade.php\');
    dbDelta($sql_one);
    }

    //-----------------------table_two-----------------------------------
        if($wpdb->get_var(\'SHOW TABLES LIKE \' . $table_add_wptstats) != $table_add_wptstats){
      $sql_two = \'CREATE TABLE \' . $table_add_wptstats . \'(
          id INT(11) UNSIGNED AUTO_INCREMENT,
          link_id INT(11),
          impressions INT(11),
          inclick INT(11),
          outclick INT(11),
          PRIMARY KEY  (id)
    ) \'. $charset_collate .\';\';

    require_once(ABSPATH . \'wp-admin/includes/upgrade.php\');
    dbDelta($sql_two);
    }

    add_option("wpt_db_version", $wpt_db_version );
}
register_activation_hook(__FILE__,\'wpt_install\');