# Apache Spark Core Day 3 Lecture

> In this lecture, Yared dives into the Query Execution Engine and explore the different types of transformations in Spark SQL, specifically narrow and wide transformations. He provides examples to illustrate these concepts and discuss the importance of schema inference for performance. He also touch…

- Web page: https://www.dataexpert.io/lesson/apache-spark-core-day-3-lecture-jan2025
- Program: [2025 New Year  Data Engineering Boot Camp starting January 6th](https://www.dataexpert.io/program/2025-new-year-data-engineering-boot-camp-starting-january-6th)
- Access: Requires enrollment in 2025 New Year  Data Engineering Boot Camp starting January 6th
- Length: 22 min video
- Skills: SQL, Python, Apache Spark
- Academy: DataExpert.io Academy

## About this lesson

In this lecture, Yared dives into the Query Execution Engine and explore the different types of transformations in Spark SQL, specifically narrow and wide transformations. He provides examples to illustrate these concepts and discuss the importance of schema inference for performance. He also touches on how to configure clusters for optimal data processing.

## Navigation

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