HLL_UNION
Returns the union of multiple HLL values.
Analyze Syntax
func.hll_union(get_column(table, 'hll_col'))
Analyze Examples
func.hll_union(get_column(table, 'hll_col'))
┌─────────────┐
│ (hll value) │
└─────────────┘
SQL Syntax
HLL_UNION(<hll_col>)
SQL Examples
SELECT HLL_CARDINALITY(HLL_UNION(hll_col)) FROM daily_sketches;
┌───────┐
│ 12500 │
└───────┘