Working with dates in SQL Server is something almost every developer runs into. You might need to figure out how many days are left in the month, get the first day of the quarter, calculate someone’s age, or add a few weeks to a deadline. Fortunately, SQL Server gives us some simple but powerful tools to help with these kinds of tasks.
In this article, we’ll walk through three of the most useful date functions: EOMONTH, DATEDIFF, and DATEADD. We’ll look at what each one does, how it works, and how you can use them in your own queries. We’ll