a Running Total of votes?

Posted on 2004-08-22
Last Modified: 2010-05-18
I need to create a query that performas a running total of votes on my mysql table : opinionvotes.

TABLE opinionvotes
userid (i.e. 143)
vote_date (i.e. 04-jun-2004)
vote_want_yes (1 or 0)
vote_want_no (1 or 0)

I need to create a query that creates a RUNNING TOTAL of the vote_want_yes and vote_want_no sorted by the vote_date ascending.


01-jan-2004 SUMvote_want_yes = 1 SUM vote_want_no = 2
02-jan-2004 SUMvote_want_yes = 5 SUM vote_want_no = 5
03-jan-2004 SUMvote_want_yes = 9 SUM vote_want_no = 8
04-jan-2004 SUMvote_want_yes = 12 SUM vote_want_no = 16
05-jan-2004 SUMvote_want_yes = 20 SUM vote_want_no = 22

Any ideas?

I tried THIS query but it returns massively high totals and I don't know why!

SELECT t1.vote_date, SUM(t2.vote_want_yes) as sumYes, SUM(t2.vote_want_no) as sumNo FROM opinionvotes t1 LEFT JOIN opinionvotes t2 on t1.vote_date >= t2.vote_date WHERE t1.opinion_id = 1057 GROUP BY t1.vote_date


Question by:rcbuchanan
LVL 48

Expert Comment

ID: 11868069
Why didn't you combine the vote_want_yes and vote_want_no into one field vote_want (1 for yes, 0 for no) Then you can easy calculate the result by:

select count(*) as num, vote_want FROM opinionvotes GROUP BY vote_date, vote_want

Expert Comment

ID: 11868688
Richard, I don't think you need a join in there at all.
Try :

SELECT vote_date, SUM(vote_want_yes) as sumYes, SUM(vote_want_no) as sumNo
FROM opinionvotes
Group by vote_date


Author Comment

ID: 11870309
no. I need a RUNNING TOTAL ... so each day is added to the SUM'd total as the query progresses.
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Expert Comment

ID: 11870493
Does your version of mysql support subqueries? If so, it's very straight forward, if not, stil possible but more messy ..


LVL 17

Accepted Solution

akshah123 earned 500 total points
ID: 11870557
it's simple try this

SELECT t1.vote_date, SUM(t2.vote_want_yes) as sumYes, SUM(t1.vote_want_no) as sumNo FROM opinionvotes t1
WHERE t1.opinion_id = 1057
GROUP BY t1.vote_date

Expert Comment

ID: 11870996
Just as a matter of interest, how is this different from my original comment? Didn't you say you needed Running totals?

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