In this article, We'll discuss the abot the scalar and aggregate functions and also understand the differences easily. So, when working with Microsoft SQL Server (MSSQL), mastering the various functions available is crucial for efficient and effective database querying and manipulation. Among the multitude of functions MSSQL provides, two fundamental types stand out: Scalar Functions and Aggregate Functions. Understanding the differences between these function types and their appropriate usage can significantly enhance your SQL querying skills. Let's delve into each type with examples to illustrate their distinctions. Let's first understand the Scalar function.