Null handling in pySpark DataFrame | isNull function in pyspark | isNotNull function in pyspark

Null handling is one of the important steps taken in the ETL process. this video shows how we can make use of the options provided in the spark.
In this video, I discussed how to use isnull, isNotNull & alias in dataframe in pyspark.
1. isNull in pyspark
2. isNotNull in pyspark
3. alias in pyspark
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