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並前往https://community.grafana.com/t/null-as-zero-not-working-making-sense-of-graphs-with-gaps-missing-data-points-in-stacked-graphs/41530

`null as zero` not working? Making sense of graphs with gaps ...

Here's a simplified postgres query of what kind of results we get. As you can see, the data has gaps, but that's fine since each time period ...

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