UPDATE wp_options SET option_value = replace(option_value,  'http://' , 'https://' );
UPDATE wp_posts SET post_content = replace(post_content, 'http://' , 'https://');
UPDATE wp_comments SET comment_content = replace(comment_content,  'http://' , 'https://' );
UPDATE wp_comments SET comment_author_url = replace(comment_author_url, 'http://' , 'https://');
UPDATE wp_users SET user_url = replace(user_url, 'http://' , 'https://');