Most, if not all, modern cloud data warehouses support some type of the DATEDIFF function. The DATEDIFF function can be used in SELECT statements and WHERE clauses. The date part: This is the days/months/weeks/years (unit) of the difference calculated.How to use the DATEDIFF function įor the DATEDIFF function, there are three elements, or arguments, passed in: This page will go over how to use the DATEDIFF function across different data warehouses and how to write more standardized DATEDIFF functions using a dbt macro (or successfully find your socks as a pair in one go). DATEDIFF is this pair of socks-you’ll inevitably find yourself Googling the syntax almost every time you use it, but you can’t go through your day without using it. But for some reason, the matching sock requires a little digging in the drawer. It’s a simple and widely used function that you’ll find yourself using more often than you expect.ĭATEDIFF is a little bit like your favorite pair of socks you’ll usually find the first one easily and feel like the day is going to be great. days, weeks, years) between a start date/time and an end date/time. The DATEDIFF function will return the difference in specified units (ex. Luckily, there’s a handy DATEDIFF function that can do that for you. “What is the average number of days to conversion?”īusiness users will have these questions, data people will have to answer these questions, and the only way to solve them is by calculating the time between two different dates. “How long has it been since this customer last ordered with us?”
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