UPDATE wp_options SET option_value = replace(option_value, 'your_old_domain.com', 'your_new_domain.com') WHERE option_name = 'home' OR option_name = 'siteurl';
UPDATE wp_posts SET post_content = replace(post_content, 'your_old_domain.com', 'your_new_domain.com');
UPDATE wp_postmeta SET meta_value = replace(meta_value, 'your_old_domain.com', 'your_new_domain.com');
UPDATE wp_comments SET comment_content = replace(comment_content , 'your_old_domain.com', 'your_new_domain.com');