pyspark.sql.functions.desc_nulls_last¶
-
pyspark.sql.functions.
desc_nulls_last
(col: ColumnOrName) → pyspark.sql.column.Column[source]¶ Returns a sort expression based on the descending order of the given column name, and null values appear after non-null values.
New in version 2.4.0.
Changed in version 3.4.0: Supports Spark Connect.
- Parameters
- col
Column
or str target column to sort by in the descending order.
- col
- Returns
Column
the column specifying the order.
Examples
>>> df1 = spark.createDataFrame([(0, None), ... (1, "Bob"), ... (2, "Alice")], ["age", "name"]) >>> df1.sort(desc_nulls_last(df1.name)).show() +---+-----+ |age| name| +---+-----+ | 1| Bob| | 2|Alice| | 0| NULL| +---+-----+