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docs: clarify numeric label values for label_value (#3129)

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https://github.com/VictoriaMetrics/VictoriaMetrics/issues/3114
Signed-off-by: hagen1778 <roman@victoriametrics.com>

Signed-off-by: hagen1778 <roman@victoriametrics.com>
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Roman Khavronenko 2022-09-26 15:48:38 +02:00 committed by Aliaksandr Valialkin
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docs/MetricsQL.md
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@ -806,7 +806,9 @@ sum by (__name__) (
#### label_value
`label_value(q, "label")` returns number values for the given `label` for every time series returned by `q`. For example, if `label_value(foo, "bar")` is applied to `foo{bar="1.234"}`, then it will return a time series `foo{bar="1.234"}` with `1.234` value.
`label_value(q, "label")` returns numeric values for the given `label` for every time series returned by `q`.
For example, if `label_value(foo, "bar")` is applied to `foo{bar="1.234"}`, then it will return a time series
`foo{bar="1.234"}` with `1.234` value. Function will return no data for non-numeric label values.
### Aggregate functions