UPDATE wp_options SET option_value = REPLACE(option_value, 'http://oldsite.com', 'https://newsite.com') WHERE option_name = 'home' OR option_name = 'siteurl';
UPDATE wp_posts SET post_content = REPLACE (post_content, 'http://oldsite.com', 'https://newsite.com');
UPDATE wp_postmeta SET meta_value = REPLACE (meta_value, 'http://oldsite.com','https://newsite.com');