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- What is Hive? Important Points, Interview Questions
- How SQL queries execute in a database, using a real query example.
- Comprehensive guide to important Points and tricky conceptual issues in SQL
- RDD and Dataframes in PySpark- Code Snipppets
- Azure Databricks tutorial roadmap (Beginner → Advanced), tailored for Data Engineering interviews in India
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Category: Tutorials
Python control statements like if-else can still be used in PySpark when they are applied in the context of driver-side logic, not in DataFrame operations themselves. Here’s how the logic works in your example: Understanding Driver-Side Logic in PySpark Breakdown of Your Example This if-else statement works because it is evaluated on the driver (the main control point of…
When working with PySpark, there are several common issues that developers face. These issues can arise from different aspects such as memory management, performance bottlenecks, data skewness, configurations, and resource contention. Here’s a guide on troubleshooting some of the most common PySpark issues and how to resolve them. 1. Out of Memory Errors (OOM) Memory-related issues are among the most frequent…
PIVOT Clause in Spark sql or Mysql or Oracle Pl sql or Hive QL The PIVOT clause is a powerful tool in SQL that allows you to rotate rows into columns, making it easier to analyze and report data. Here’s how to use the PIVOT clause in Spark SQL, MySQL, Oracle PL/SQL, and Hive QL:…