In this article, I will walk you through everything you need to know about SQL scalar functions: how they operate, the built-in functions every developer must know, how to build custom User-Defined Scalar Functions (UDFs). SQL Scalar Functions What is a SQL Scalar Function? A scalar function in SQL is a function that accepts one … Read more
In this comprehensive tutorial, I will guide you through a deep-dive exploration of SQL RANK and DENSE_RANK. We will break down their mathematical differences, analyze their evaluation mechanics inside the query optimizer, dissect the role of the PARTITION BY clause, and establish foundational best practices. SQL RANK vs DENSE_RANK The Genesis of Analytic Rank: Understanding … Read more
In this comprehensive article, I’ll walk you through everything you need to know about manipulating dates in SQL Server – from basic operations to advanced techniques. Let’s dive in. SQL Server Date Math Before we explore the specifics, it’s essential to understand why date manipulation is so critical in database applications: Check out SQL Server … Read more
Recently, I received a requirement for aggregating data by date. In this comprehensive article, I’ll walk you through various techniques for effectively using SQL Server’s GROUP BY clause with date values and provide multiple examples. SQL Server GROUP BY Date Dates in SQL Server contain date and time components, meaning when you group by a … Read more
In this article, I’ll explain various methods for finding and working with the max() for date in SQL Server with multiple examples. SQL Server MAX Date The foundation of finding the most recent date in SQL Server is the MAX function, which returns the highest value in a selected column. When applied to date columns, … Read more
As a senior database developer working with SQL Server, I’ve found that retrieving the current date and time is one of your most fundamental operations. In this comprehensive article, I’ll walk you through various methods to get the current date in SQL Server and share best practices based on real-world examples. SQL Server Get Current … Read more