Learning Spark SQL String Functions with Explanations and Code Examples

Learn how to use different Spark SQL string functions to manipulate string data with explanations and code examples.

SQL Logic

In this article, I will discuss the history and thinking behind several types of logic that are typically associated with writing relational database code.

Does Your GROUP BY Order Matter?

Sometimes when you do GROUP BY, the order of the columns does matter. For example, these two SELECT queries produce different results:

Kubernetes For Complete Beginners

Container orchestration has become a cornerstone of modern application deployment. For beginners stepping into the world of modern application deployment and orchestration, understanding the essence and significance of Kubernetes is essential.

Pagination and ordering by large values

Pagination is a technique for limiting output. Think of Google search results, shopping the electronics category on Amazon, or browsing tagged questions on Stack Overflow. Nobody could consume all of the results in a single shot, and no site wants to spend the resources required to present them all to us

Get the most out of SQL Server Agent logs

If you haven’t migrated your workloads to a managed database platform yet, you’re probably still relying on SQL Server Agent for various maintenance and other scheduled tasks. Most of the time, these processes just work. But when it’s time to troubleshoot, it can be cumbersome to get to the root of some problems.

Finding Sister Locations to Help Each Other: Answers & Discussion

This week’s query exercise asked you to find two kinds of locations in the Stack Overflow database.

Department of Redundancy Department

Ever wonder all the reasons that we use databases instead of file systems? While we don’t think of it too much anymore, the first reason that databases came into existence was to remove redundancies.

SQL Server Plan Cache Bloat Performance Impacts

Learn about the SQL Server plan cache and how SQL Server caches query plans, and the potential of plan cache bloat which could impact performance.

SQL Server 2022 Query Performance Tuning: Troubleshoot and Optimize Query Performance

Troubleshoot slow-performing queries and make them run faster. Database administrators and SQL developers are constantly under pressure to provide more speed. This new edition has been redesigned and rewritten from scratch based on the last 15 years of learning, knowledge, and experience accumulated by the author. The book Includes expanded information on using extended events, automatic execution plan correction, and other advanced features now available in SQL Server.

• Printed book:
  • US
• Kindle book:
  • US