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POInserting into two SQL tables using a value from one
 

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  1. POInserting into two SQL tables using a value from one
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    <p>I am building a simple event registration system using MySQL and PHP. I have four tables:</p> <pre><code>events: event_id, event_name instance: instance_id, event_id, date attendee: attendee_id, attendee_name, attendee_email, attendee_tel registration: reg_id, attendee_id, instance_id </code></pre> <p>To clarify, the instance table contains instances of a given event, ie a specific event on a specific date.</p> <p>When an attendee registers (via a form), I want to write their details to the <code>attendee</code> table, then write the event they have registered for in the <code>registration</code> table, along with the relevant <code>attendee_id</code>, so that when I query the <code>registration</code> table later on, it will show me what event has been registered for and by whom.</p> <p>However, I'm new to SQL (and databases in general, not to mention PHP as well), so I'm not sure how I can do that given that the <code>attendee_id</code> has only just been generated by adding the attendee to the table. I can easily insert a row into the <code>attendee</code> table with:</p> <pre><code>$q = "INSERT INTO attendee (attendee_name, attendee_email, attendee_tel) VALUES ( '$fullname', '$email', '$tel' )"; </code></pre> <p>With the values obviously being grabbed by <code>$_POST</code> from the form. The form also grabs the <code>instance_id</code>, incidentally.</p> <p>So I just need to know how I can insert the relevant information into the <code>registration</code> table. Any ideas?</p>
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    1. COPresuably, `attendee.attendee_id` is an `AUTO_INCREMENT` primary key. After you insert your new record into `attendee`, you need to retrieve this generated value for `attendee_id` and then issue a second `INSERT INTO registration` statement. Example: http://stackoverflow.com/questions/12600527/accessing-last-inserted-row-in-mysql
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    2. COYes, all the _ids are primary A_I keys.
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    3. COpossible duplicate of [Insert related multiple records in mysql](http://stackoverflow.com/questions/12887246/insert-related-multiple-records-in-mysql)
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