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
8,500 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
22,782 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
32,988 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)
5,191 reads
2018-02-23 (first published: 2018-02-19)
154 reads
2017-12-29
1,089 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)
499 reads
Blogs
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Forums
sp_prepare and sp_execute vs sp_executesql
I have noticed sp_executesql also makes a single plan for a stmt with parameter...
Find Invalid Objects in SQL Server
Comments posted to this topic are about the item Find Invalid Objects in SQL...
Question of the Day
Who am I?
If I want to track which login called a stored procedure and use the value in an audit, what function can I use to replace the xxx below?
create procedure AddNewCustomer
@customername varchar(200)
AS
BEGIN
DECLARE @added VARCHAR(100)
SELECT @added = xxx
IF @customername IS NOT NULL
INSERT dbo.Customer
(
CustomerName,
AddedBy
)
VALUES
(@customername, @added)
END See possible answers