Web Reference: Jan 5, 2018 · In this article, we'll guide you through some of the most useful SQL functions that every data enthusiast should be familiar with. These functions are the building blocks for effective database querying and management. Nov 15, 2025 · SQL functions are built-in operations that perform calculations, manipulate data, and return results in queries, making data handling simpler without writing complex code. Learn top SQL functions with simple examples for interviews, including window, aggregate, string, and date functions to write better and faster queries.
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