count_distinct¶

Description¶

Estimate the approximate number of distinct values in the input using hyper-log-log. (This is less precise, but faster than count_distinct_exact).

int64

This is an aggregate function (aggregates rows over a group in aggregate verbs.)

This is a window function (calculates over a group of multiple input rows using windowing.)

count_distinct( item ... )

Argument	Type	Required	Multiple	Constant
item	variant	Required	Can be multiple	Variable

countdistinct (deprecated)