Hi,

`I am quickly losing patience with a task that requires a sum of values
``that occur on the same date, but at different times.
`
My raw data sheet is in 4 columns
Date/Time | Value 1| Value Y| Value z
2021-10-08 08:00:00| 5| 7| 0.15
2021-10-08 14:05:16| 3| 10| 5
2021-10-09 10:05:30| 15| 3| 25
2021-10-09 18:00:00| 15| 9| 6
...
..
.

`I have a secondary sheet with just the date i.e. 2010-10-08, acquired
``with formula `=LEFT($Data.A4,10)'. Column B of this sheet needs to be
``the SUM of all the numbers in the 3rd column, BUT only for the date in
``column A i.e.
`
2010-10-08| 17
2010-10-09| 12
...
..
.

`I have tried many Google searches and seen many videos on how this is
``supposed to work yet for some reason, being race, colour, creed, or
``stupidity, I cannot get the result I seek. It would seem that the
``summation of data with the same date, but different time component in
``the main data sheet is causing an issue.
`

`I'd really appreciate some pointers here, even if not possible. If not
``possible what could be done. I just don't understand the
``INDEX(MATCH())/vlookupÂ argument.
`
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### Context

**[libreoffice-users] SUM, SUMIF, IF, INDEX, MATCH, VLOOKUP?** · *Hylton Conacher (ZR1HPC)*
- Re: [libreoffice-users] SUM, SUMIF, IF, INDEX, MATCH, VLOOKUP? ·
*jean-francois*
- Re: [libreoffice-users] SUM, SUMIF, IF, INDEX, MATCH, VLOOKUP? ·
*John Kaufmann*
- Re: [libreoffice-users] SUM, SUMIF, IF, INDEX, MATCH, VLOOKUP? ·
*Michael D. Setzer II*
- Re: [libreoffice-users] SUM, SUMIF, IF, INDEX, MATCH, VLOOKUP? ·
*Michael D. Setzer II*
- Re: [libreoffice-users] SUM, SUMIF, IF, INDEX, MATCH, VLOOKUP? ·
*Remy Gauthier*
- Re: [libreoffice-users] SUM, SUMIF, IF, INDEX, MATCH, VLOOKUP? ·
*Michael D. Setzer II*
- Re: [libreoffice-users] SUM, SUMIF, IF, INDEX, MATCH, VLOOKUP? ·
*Hylton Conacher (ZR1HPC)*

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