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num_vals() ToolkitTimescaleDB Toolkit functions are available under Timescale Community Edition. They are automatically included with Timescale Cloud. Click to learn more.
Toolkit
TimescaleDB Toolkit functions are available under Timescale Community Edition. They are automatically included with Timescale Cloud. Click to learn more.
num_vals(summary StatsSummary1D) RETURNS BIGINT
num_vals(summary StatsSummary2D) RETURNS BIGINT
Get the number of values contained in a statistical aggregate. This saves space
when you need both a count and other statistical aggregates as part of a continuous
aggregate. You do not need to specify a separate count
aggregate.
For more information about statistical aggregate functions, see the hyperfunctions documentation.
Required arguments
Name | Type | Description |
---|---|---|
summary | StatsSummary1D /StatsSummary2D | The already constructed data structure from a previous stats_agg call |
Returns
Column | Type | Description |
---|---|---|
num_vals | BIGINT | The number of values in the stats agg |
Sample usage
SELECT num_vals(stats_agg(data))
FROM generate_series(0, 100) data;
num_vals
-----------
101
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