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Editorial Team
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Asked: 2026-06-01T23:19:06+00:00

Now here’s a fun MySQL question, I wonder if it’s even possible! Disclaimer: Although

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Now here’s a fun MySQL question, I wonder if it’s even possible!

Disclaimer: Although it’s very similar question that I asked before, it actually is COMPLETELY different. Just saying before anyone says I’ve asked this before.

For this example lets say I want SUMS() of multiples of 20.

I want to SUM() the row score and return the date.

Lets say I have the following table sorted by date ASC:

Data

score |   date
  4     2000-01-01
  2     2000-01-02
  6     2000-01-03
  1     2000-01-04 //Score 4+2+6+1 = 13
  7     2000-01-05 //Score 4+2+6+1+7 = 20 so return this date
  1     2000-01-06
  2     2000-01-07
  1     2000-01-08
  5     2000-01-09
  1     2000-01-10
  9     2000-01-11 //Score = 39 so far.
  7     2000-01-12 //Score = 46 It's not 40 but is the closest number above 40 so return it.
  3     2000-01-13
  4     2000-01-14
  7     2000-01-15 //Score = 60, return this date.

Expected results:

score | date
 20     2000-01-05
 40     2000-01-12
 60     2000-01-15

And etcetera. Is it possible to do this in MySQL?

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1 Answer

  1. Editorial Team

    By using SQL Variables, you don’t have to keep doing recursive aggregations for every subsequent row to tally up to the given entity. This does each one in sequence with a flag of which one triggers the multiple of 20. That result is then processed out only where the “ThisOne” flag is set to 1.

    select 
      M20.*
   from 
      ( select 
              TransDate,
              score,
              if( @runTotal + Score >= 20 * @multCnt, 1, 0 ) as ThisOne,
              @multCnt := @multCnt + if( @runTotal + Score >= 20 * @multCnt, 1, 0 ) as nextSeq,
              @runTotal := @runTotal + Score
           from Mult20s,
                ( select @multCnt := 1,
                         @runTotal := 0 ) sqlvars
           order by transdate ) M20
   where
      M20.ThisOne = 1
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