SQL Window Functions Series: LAG() and LEAD()
Dive deep into the powerful SQL window functions, LAG() and LEAD(). Explore their intricacies, discover real-world examples, and avoid common pitfalls.
2023-12-11
12,225 reads
Date computation
Combine DATE and TIME to DATETIME2 in SQL Server
The most common method on the internet for combining DATE and TIME columns in SQL Server is incorrect. This article demonstrates why that and other methods are incorrect and two lesser known high performance methods that produce correct results even for the "edge cases".
2023-08-07
25,992 reads
How to Find the Start and End Dates for the Current Week (and more)
Learn to calculate Start / First of Week, End of Week, Start of Next Week, Year, Quarter, and Month of the week, Week Numbers and more in T-SQL (Jeff Moden)
2022-07-13
35,738 reads
Add working days but avoid holidays
A function to add or subtract working days taking into account weekends and using a table of non-working days.
2019-07-10 (first published: 2019-06-26)
5,295 reads
2018-02-23 (first published: 2018-02-19)
219 reads
2017-12-29
1,142 reads
Compute Holiday Day of the Month for any Year
This script provides the day of the month for the standard bank holidays for any given year. This is especially useful for computing the workday after a holiday.
2017-05-24 (first published: 2017-05-10)
557 reads
Blogs
Using AI to Build Semantic Models, Ontologies, and Fabric Data Agents
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(This is the third post in a three-part series on how AI is changing...
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Continuing with my takeaways from SQLCon and FabCon Europe in Barcelona, let’s talk about...
Yippee-Kai-Yay 2027 Summit in Denver
By Steve Jones
Next year the PASS Data Community Summit is in DENVER! and London, but Denver...
Forums
Pay for Performance
Comments posted to this topic are about the item Pay for Performance, which is...
Life hack that has worked well for me
I wrote about this several years ago but will contribute again a life hack...
Trying to make this faster using not exists
Hi I have this query that is slow during the 'not in' part of...
Question of the Day
Switching Schemas I
I run this query:
SELECT s.name AS schemaname , o.name AS objectname FROM sys.objects o INNER JOIN sys.schemas s ON s.schema_id = o.schema_id WHERE o.name = 'Beer'I get one row back for an object named dbo.beer. There is an ETL schema and both of these are nonpartitioned tables. I run this code:
ALTER TABLE dbo.beer switch TO etl.beerWhat happens? See possible answers