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This section includes frequency aggregate APIs, which find the most common elements out of a set of vastly more varied values.
For these hyperfunctions, you need to install the TimescaleDB Toolkit PostgreSQL extension.
Frequency analysis functions
| Hyperfunction type | Hyperfunction name | Toolkit | Experimental | |
|---|---|---|---|---|
| count_min_sketch() functions | ||||
| Aggregate | count_min_sketch() | ✅ | ✅ | |
| Accessor | approx_count() | ✅ | ✅ | |
| freq_agg() functions | ||||
| Aggregate | freq_agg() | ✅ | ✅ | |
| Accessor | into_values() | ✅ | ✅ | |
| min_frequency(), max_frequency() | ✅ | ✅ | ||
| topn_agg() functions | ||||
| Aggregate | topn_agg() | ✅ | ✅ | |
| Accessor | into_values() | ✅ | ✅ | |
| min_frequency(), max_frequency() | ✅ | ✅ | ||
| topn() | ✅ | ✅ | ||
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