Nibur :
I want to take the percentage of only SLA's in the sla_osla table and group them by all the months of current year
Here is my table
http://sqlfiddle.com/#!9/179518/2
I have tried the following query
SELECT MONTH(service_date),((nums/(count(*)))*100) AS perc
FROM orders CROSS JOIN (SELECT MONTH(service_date) AS months, COUNT(*) AS
nums FROM orders WHERE YEAR(service_date) = year(CURRENT_DATE()) AND sla_osla =
'sla'
GROUP BY MONTH(CURRENT_DATE())) table1
WHERE YEAR(service_date) = YEAR(current_date) AND sla_osla IN ('sla','osla')
GROUP BY MONTH(service_date)
I want output like this
month percentage
1 75%
2 50%
exussum :
http://sqlfiddle.com/#!9/179518/76
This is more simple sql
Select year(service_date), month(service_date), sum(sla_osla = "sla")/ count(*) * 100 FROM orders group by year(service_date), month(service_date)
I've also grouped by year here.
Edit if you want the percent sign etc then use this