Function approx_count_distinct

approx_count_distinct(columnName: string): Column
Aggregate function: returns the approximate number of distinct items in a group.
Parameters
- columnName: string
Returns Column
- Defined in src/org/apache/spark/sql/functions.ts:163
approx_count_distinct(columnName: string, rsd: number): Column
Aggregate function: returns the approximate number of distinct items in a group.
Parameters
- columnName: string
- rsd: number
  maximum relative standard deviation allowed (default = 0.05)
Returns Column
- Defined in src/org/apache/spark/sql/functions.ts:164
approx_count_distinct(column: Column): Column
Aggregate function: returns the approximate number of distinct items in a group.
Parameters
- column: Column
Returns Column
- Defined in src/org/apache/spark/sql/functions.ts:165
approx_count_distinct(column: Column, rsd: number): Column
Aggregate function: returns the approximate number of distinct items in a group.
Parameters
- column: Column
- rsd: number
  maximum relative standard deviation allowed (default = 0.05)
Returns Column
- Defined in src/org/apache/spark/sql/functions.ts:166