workshops-spark_intro

Introductory workshops for beginners in Apache Spark with Python (pyspark) and SQL (Spark SQL). Repository includes IPYNB notebooks and data.

Note: file paths in notebooks will require updating

I - Intro

Covers some core concepts using Spark for data analysis including:

• Loading data
• Spark SQL & basic data transformations
• Writing data
• Caching data for performance

II - Tidy Data

Demonstrates the concept of "Tidy Data" using example code in Apache Spark and tidying five common types of untidy data:

• Column headers are values, not variable names.
• Multiple variables are stored in one column.
• Variables are stored in both rows and columns.
• Multiple types of observational units are stored in the same table.
• A single observational unit is stored in multiple tables.