I am trying to calculate a percentage in my sql statement which gives a wrong answer

Question

This is my sql statement. The sum of callers total is: 322 and the sum of the other four is: 9966. 322 / 9966 = 0,32... Now my problem is that in sql it gives 2.2233. Which is absolutely wrong. I use this also in one other place in which this works.

SUM(callers_total / (a.start_reached_speech_mobile + a.start_reached_speech_landline + a.start_reached_text + a.start_reached_email))

Really hope someone could clarify why this is going wrong because I really don't have a clue.

Answer 1

Try:

SUM(callers_total) /
SUM(a.start_reached_speech_mobile + a.start_reached_speech_landline + a.start_reached_text + a.start_reached_email)

Answer 2

You're summing up all the percentages, it looks like. What happens if you get rid of the outer SUM?