A 3-day bug hunt on a 3-person team costs up to β¬7,200 in lost engineering time. This workshop teaches you to prevent that β unit tests, data tests, and integration tests for PySpark and Databricks Lakeflow, including Spark Declarative Pipelines.
If you came to data engineering after having a BI career, you certainly know what the pivot is. It was not my case and was quite amazed by this operation that transforms values from rows into columns. If you want to understand how it's possible, this article will present some internals of pivoting data in Apache Spark.
