SQL - Calculate percentage on count(column)
<p>I have the following piece of code which counts how many times something appears in the event column. </p>

<pre><code>SELECT event, count(event) as event_count   
FROM event_information
group by event

event   event_count
a       34
b       256
c       45
d       117
e       3
</code></pre>

<p>I want to be able to calculate the percentage of each of the rows like so.</p>

<pre><code>event   event_count event_percent
a       34          7.47
b       256         56.26
c       45          9.89
d       117         25.71
e       3           0.66
</code></pre>