Extension:Newsletter/nl_issues table
mysql> describe nl_issues; +-------------------+------------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +-------------------+------------------+------+-----+---------+-------+ | nli_issue_id | int(10) unsigned | NO | PRI | NULL | | | nli_page_id | int(11) | NO | | NULL | | | nli_newsletter_id | int(11) | NO | PRI | NULL | | | nli_publisher_id | int(11) | NO | | NULL | | +-------------------+------------------+------+-----+---------+-------+