asc_nulls_first (kolom)

Sorteer de kolom in oplopende volgorde, waarbij null-waarden eerst worden weergegeven.

Syntaxis

asc_nulls_first()

Retouren

Rubriek

Examples

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

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