Functions.CountDistinct 方法

定義

命名空間:

Microsoft.Spark.Sql

組件:

Microsoft.Spark.dll

套件:

Microsoft.Spark v1.0.0

多載

CountDistinct(Column, Column[])	傳回群組中相異專案的數目。
CountDistinct(String, String[])	傳回群組中相異專案的數目。

CountDistinct(Column, Column[])

傳回群組中相異專案的數目。

public static Microsoft.Spark.Sql.Column CountDistinct(Microsoft.Spark.Sql.Column column, params Microsoft.Spark.Sql.Column[] columns);

static member CountDistinct : Microsoft.Spark.Sql.Column * Microsoft.Spark.Sql.Column[] -> Microsoft.Spark.Sql.Column

Public Shared Function CountDistinct (column As Column, ParamArray columns As Column()) As Column

參數

column

Column

要套用的資料行

columns

Column[]

要套用的其他資料行

傳回

Column

Column 物件

CountDistinct(String, String[])

傳回群組中相異專案的數目。

public static Microsoft.Spark.Sql.Column CountDistinct(string columnName, params string[] columnNames);

static member CountDistinct : string * string[] -> Microsoft.Spark.Sql.Column

Public Shared Function CountDistinct (columnName As String, ParamArray columnNames As String()) As Column

參數

columnName

String

資料行名稱

columnNames

String[]

其他資料行名稱

傳回

Column

Column 物件