Before the SQL Window functions were implemented, it was tricky to calculate rolling totals or moving averages efficiently in SQL Server. There are now a number of techniques, but which has the best performance? Dwain Camps gets out the metaphorical stopwatch.
2013-11-01
4,628 reads
A SQL expression may look elegant on the page but it is only valuable if its performance is good. Do window functions run quicker than their conventional equivalent code? Fabiano Amorim gives a definitive answer.
2012-01-17
4,074 reads
Fabiano Amorim continues his introduction to SQL Server's implementation of the window functions by giving a history of what got implemented and when, and explaining the concept of the 'Frame' in a window function, with plenty of examples.
2011-12-23
3,169 reads
Here’s a way to centralize management, rotate secrets conveniently without downtime, automate synchronization and...
This may or may not be helpful in the long term, but since I’m...
By Steve Jones
“I’m sick of hearing about Red Gate.” The first article in the book has...
Comments posted to this topic are about the item Dynamic T-SQL Script Parameterization Using...
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Comments posted to this topic are about the item Multiple Sequences
In SQL Server 2022, I run this code:
CREATE SEQUENCE myseqtest START WITH 1 INCREMENT BY 1; GO CREATE TABLE NewMonthSales (SaleID INT , SecondID int , saleyear INT , salemonth TINYINT , currSales NUMERIC(10, 2)); GO INSERT dbo.NewMonthSales (SaleID, SecondID, saleyear, salemonth, currSales) SELECT NEXT VALUE FOR myseqtest , NEXT VALUE FOR myseqtest , ms.saleyear , ms.salemonth , ms.currMonthSales FROM dbo.MonthSales AS ms; GO SELECT * FROM dbo.NewMonthSales AS nmsAssume the dbo.MonthSales table exists. If I run this, what happens? See possible answers