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
10,894 reads
LAG function
The SQL Server LAG Function
The LAG function can really improve performance over the old double JOIN.
2019-01-21 (first published: 2019-01-14)
3,829 reads
Blogs
Learn about Modern Microsoft Apps in San Diego
By Steve Jones
I wrote about learning today for the editorial: I Can’t Make You Learn. I...
How To Deploy Fabric SQL and Azure SQL Databases with Azure DevOps
By ReviewMyDB
Fabric has CI/CD built in, but if you've tried to use it for database...
A New Word: Attriage
By Steve Jones
attriage – n. the state of having lost all control over how you feel...
Forums
Getting results from a Procedure to join to a query
I have a need to execute a stored procedure and return the results to...
Upgrade 2016 Standard to 2022 Express
Title pretty much says it all - can this be done? I've tried several...
BIT_COUNT II
Comments posted to this topic are about the item BIT_COUNT II
Question of the Day
BIT_COUNT II
In SQL Server 2025, I have a table (dbo.UserPermission) that contains this data:
UserID UserPermissions 15 23 37 4 NULLWhat is returned when I run this code:
select bit_count(UserPermissions) as PermissionCount from dbo.UserPermission where UserID = 4;See possible answers