Extension:Newsletter/nl_subscriptions table
mysql> describe nl_subscriptions; +-------------------+---------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------------------+---------+------+-----+---------+-------+ | nls_newsletter_id | int(11) | NO | PRI | NULL | | | nls_subscriber_id | int(11) | NO | PRI | NULL | | +-------------------+---------+------+-----+---------+-------+