SQL Server makes it very easy to gather the week number of a specific date.
Maybe you need to know what week of the year a certain date falls within. The DATEPART system function is what we can use to gather that information.
Using the DATEPART system function
The date of the writing of this article is March 15TH, 2024, which is within the eleventh week of the year.
The way we can gather that information via SQL is by using the handy DATEPART system function. Here’s what the general syntax looks like:
DATEPART(<date part>,<the date>)
There are many values that the <date part> can be. In our case, we’re interested in gathering a week number, so we can simply outline the word ‘WEEK‘ here.
The second argument is just the date in question. I’ll just use the handy GETDATE() system function to get today’s date (which again, at the time of this writing is March 15th, 2024).
Here’s what the output would look like:
As you can see, it simply returns an integer for the week of the year the date falls within.
You can abbreviate the date part of ‘WEEK‘ to just ‘WK‘ or ‘WW‘ if you want to.
So simple!
Next Steps:
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Do you know how the DATETIME2 data type works? It’s a very common data type you will probably see in your work as a data professional. Check out the full beginner-friendly tutorial to learn more:
DATETIME2 Data Type: Explained
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