countDistinct
Edit page Last modified: 14 January 2025Returns number of distinct combinations of values in selected columns of DataFrame.
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df.countDistinct { age and name }val age by column<Int>()
val name by columnGroup()
df.countDistinct { age and name }df.countDistinct("age", "name")When columns are not specified, returns number of distinct rows in DataFrame.
df.countDistinct()