I have the following piece of code which counts how many times something appears in the event column.
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
I want to be able to calculate the percentage of each of the rows like so.
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
SELECT event,
count(event) as event_count,
count(event) * 100.0 / (select count(*) from event_information) as event_percent
FROM event_information
group by event