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Editorial Team
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Asked: 2026-06-17T18:28:00+00:00

I’m looking select every X point from a table that holds a time-stamp ,

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I’m looking select every X point from a table that holds a time-stamp , value pair. For example:

CREATE TABLE data (
value double NOT NULL,
timestamp datetime NOT NULL,
PRIMARY KEY (timestamp),
) ENGINE=InnoDB DEFAULT CHARSET=latin1

If I run:

SELECT * FROM data where timestamp < a and timestamp > b order by timestamp desc

I can receive all of the values and filter them in code, however is there a better way to do this (hopefully directly in sql). We can safely assume that data points will occur every X minutes.

Thanks,

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1 Answer

  1. Editorial Team

    How about taking the difference between the timestamp and your zero-reference point in minutes, and checking if it’s at the interval? Assuming your reference point is b:

    WHERE MOD(TIMESTAMPDIFF(MINUTE, timestamp, b), @interval) = 0

    Of course you will not be able to use an index with this but at least you can avoid returning all the data.

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