COUNT_ DISTINCT_ COMBINE
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Merges two or more HyperLogLog states into a new state and returns a value of type
VARBINARY(16384) representing the new state.
APPROX_COUNT_DISTINCT_COMBINE ( expr )
An expression evaluating to a scalar value of type
expr is typically the name of a column.
APPROX_ uses values in the column (which are HyperLogLog states) to create a new state.
This function is used in conjunction with the
APPROX_ Distinct Count Estimation Functions
Last modified: February 24, 2023