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POFilter MySQL table using data from another table
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  1. POFilter MySQL table using data from another table
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    copied!<p>I have one table containing "user sessions" and another to indicate violations in the system. One possible violation is having a user logged on for more than 12 hours straight.</p> <p>The tables are as followed:</p> <pre><code>notification: +--------------+-------------+------+-----+---------+----------------+ | Field | Type | Null | Key | Default | Extra | +--------------+-------------+------+-----+---------+----------------+ | id | int(11) | NO | PRI | NULL | auto_increment | | host_id | int(11) | NO | MUL | NULL | | | alert_id | int(11) | NO | MUL | NULL | | | event_start | datetime | NO | | NULL | | | time_noticed | datetime | NO | | NULL | | | info | varchar(45) | YES | | NULL | | | seen | int(11) | NO | | NULL | | +--------------+-------------+------+-----+---------+----------------+ login: +----------+-------------+------+-----+---------+-------+ | Field | Type | Null | Key | Default | Extra | +----------+-------------+------+-----+---------+-------+ | username | varchar(45) | NO | | NULL | | | host_id | int(11) | NO | MUL | NULL | | | start | datetime | NO | | NULL | | | end | datetime | NO | | NULL | | | last | int(11) | NO | | NULL | | +----------+-------------+------+-----+---------+-------+ </code></pre> <p>The conditions I want for the result table are:<br> login.last = 1, login.host_id=X, end>start+12hours<br> and to make sure I didn't report this instance before:<br> login.host_id!=notification.host_id, notification.alert_id!=Y, login.start!=notification.event_start, login.username!=notification.info<br> (in other words, I don't want to get another report of the same user, on the same host, making the same violation which started at the same time)</p>
 

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