Let's see how to update your domain links after a WordPress migration.

Take a look at the database

Let's see how the links look on the db:

SELECT * FROM wp_options WHERE option_name = 'home' OR option_name = 'siteurl';

Result:

+-----------+-------------+------------------------------+----------+
| option_id | option_name | option_value                 | autoload |
+-----------+-------------+------------------------------+----------+
|         2 | home        | https://myold-domain.com     | yes      |
|         1 | siteurl     | https://myold-domain.com     | yes      |
+-----------+-------------+------------------------------+----------+
2 rows in set (0.00 sec)

As you see, the links have the domain plus the protocol (http or https).

Do the changes

Run these queries on your MySQL console.

Replace New with your new domain (ex. mynew-domain.com). Replace Old with your old domain (ex. myold-domain.com):

UPDATE wp_options SET option_value = replace(option_value, 'Old', 'New') WHERE option_name = 'home' OR option_name = 'siteurl';
UPDATE wp_posts SET post_content = replace(post_content, 'Old', 'New');
UPDATE wp_postmeta SET meta_value = replace(meta_value,'Old','New');
UPDATE wp_usermeta SET meta_value = replace(meta_value, 'Old','New');
UPDATE wp_links SET link_url = replace(link_url, 'Old','New');
UPDATE wp_comments SET comment_content = replace(comment_content , 'Old','New');

TIP

Do a backup before doing any changes. Use a WP backup plugin for this.

HTTP vs HTTPS

Use the same queries to fix any http into https. Just re-run them replacing New with https:// and Old with http://.

MySQL Credentials

If you don't have the credentials, they are on wp-config:

/** MySQL database username */
define('DB_USER', 'daniel');

/** MySQL database password */
define('DB_PASSWORD', '10203040');

/** MySQL hostname */
define('DB_HOST', 'localhost');

Troubleshooting: Can't access admin dashboard

If for some reason you can't access the admin dashboard, edit wp-config.php and set your new domain:

define( 'WP_HOME', 'https://example.com' );
define( 'WP_SITEURL', 'https://example.com' );