desc_nulls_last (kolumn)

Sortera kolumnen i fallande ordning med null-värden som visas sist.

Syntax

desc_nulls_last()

Retur

Kolumn

Exempel

from pyspark.sql import Row
df = spark.createDataFrame(
    [('Tom', 80), (None, 60), ('Alice', None)], ["name", "height"])
df.select(df.name).orderBy(df.name.desc_nulls_last()).collect()

# [Row(name='Tom'), Row(name='Alice'), Row(name=None)]