pyspark.sql.functions.greatest¶
-
pyspark.sql.functions.greatest(*cols: ColumnOrName) → pyspark.sql.column.Column¶ Returns the greatest value of the list of column names, skipping null values. This function takes at least 2 parameters. It will return null iff all parameters are null.
Examples
>>> df = spark.createDataFrame([(1, 4, 3)], ['a', 'b', 'c']) >>> df.select(greatest(df.a, df.b, df.c).alias("greatest")).collect() [Row(greatest=4)]