documentationcount_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).
Return type¶
int64
Domain¶
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.)
Categories¶
Usage¶
count_distinct( item ... )
Argument |
Type |
Required |
Multiple |
|---|---|---|---|
item |
any |
Required |
Can be multiple |
Aliases¶
countdistinct (deprecated)