DW and My SQL error must be obvious

I'm building a site in DW CC on and i Mac with the latest MAMP Pro installed.

For various reasons I'm importing/Exporting sql files from live servers using PHP My Admin, and reimporting to a local site.

I'm getting the error msg below for one such import:

Error

SQL query:

CREATE TABLE IF NOT EXISTS `wp_commentmeta` (

  `meta_id` bigint(20) unsigned NOT NULL AUTO_INCREMENT,

  `comment_id` bigint(20) unsigned NOT NULL DEFAULT '0',

  `meta_key` varchar(255) DEFAULT NULL,

  `meta_value` longtext,

  PRIMARY KEY (`meta_id`),

  KEY `comment_id` (`comment_id`),

  KEY `meta_key` (`meta_key`)

) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=9

MySQL said:

http://localhost:8888/phpMyAdmin/url.php?url=https%3A%2F%2Fdev.mysql.com%2Fdoc%2Frefman%2F5.6%2Fen%2Ferror-messages-server.html

#1046 - No database selected

Can anyone enlighten on the implications of this, and how it could be corrected?

The last line (#1046) . . . . I thought I'd dealt with that just prior to the export, but apparently not.

Thanks all