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UPDATE wp_posts SET guid = replace(guid, 'http://localhost/имя_сайта_на_denwer','http://newdomain.ru');

UPDATE wp_options SET option_value = replace(option_value, 'http://localhost/имя_сайта_на_denwer',
'http://newdomain.ru') WHERE option_name = 'home' OR option_name = 'siteurl';