notNull questions

notNull answers

• Pyspark - How to set the schema when reading parquet file from another DF?
• Can I get metadata of files reading by Spark
• How to handle T and Z in the date format using pyspark functions [duplicate]
• Cannot have map type columns in DataFrame which calls set operations
• AnalysisException: u'Cannot resolve column name
• How to select all columns except 2 of them from a large table on pyspark sql?
• How do I read a text file & apply a schema with PySpark?
• Getting HDFS Location of Hive Table in Spark
• spark throws error when reading hive table
• Pyspark: Reference is ambiguous when joining dataframes on same column