var(col) returns the sample variance of the values in the provided column.

Non-numeric values are ignored. Variance requires at least two values to calculate; if the provided column does not have enough numeric values or the column does not exist, var will return null.


A table with one row and one column, called @q.var.


Compute the variance of elapsed time in milliseconds for requests in the checkout_api service, aggregated by host.

kubernetes.container_name: "checkout_api"
| stats var(log.%kv.elapsed_ms) by host

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