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SELECT @old_domain := 'http://www.old-domain.com' , @new_domain := 'http://www.new-domain.com';
UPDATE wp_options SET option_value = replace(option_value, @old_domain, @new_domain) WHERE option_name = 'home' OR option_name = 'siteurl';
UPDATE wp_posts SET guid = replace(guid, @old_domain, @new_domain);
UPDATE wp_posts SET post_content = replace(post_content, @old_domain, @new_domain);