Spark Programming in Python for Beginners with Apache Spark 3 - Creating Spark DataFrame Schema

The video tutorial discusses the challenges of schema inference in CSV and JSON files and emphasizes the importance of explicitly setting schemas for data frames in Apache Spark. It explains Spark's unique data types and their role in optimizing execution plans. The tutorial covers two methods for defining schemas: programmatically using struct types and fields, and using DDL strings. It also addresses common errors, such as date parsing issues, and provides solutions for defining date formats. The tutorial concludes with a demonstration of using DDL strings for schema definition.

What happens if the types in the data do not match with the schema at runtime?

How can you define the date format pattern for a CSV source in Spark?

Explain the structure of a schema DDL in Spark.