How LAG compares to other techniques
LAG pulls a column from another row without a self-join. In this article, Kathi Kellenberger shows how LAG compares to other techniques
2021-09-24
databases
SQL Server identity column
The SQL Server identity column is used to populate a column with incrementing numbers on insert. In this article, Greg Larsen explains how it works.
2021-09-13
Oracle sequences – 12c features including “identity”
Oracle added several enhancements to the sequence object in version 12c, including an “identity” column feature. Jonathan Lewis explains how to work with these new features.
2021-09-10
Testing SQL Server Databases Using SQL Test
During database development, as well as writing SQL, you must also write the tests that prove your SQL code meets all the requirements. The article will help you get started with database testing for your SQL Server databases, by creating and running unit tests against them, as well as static code analysis tests.
2021-08-20
SQL Compilations/sec is not what you think it is
SQL Server perfmon counters provide a wealth of information about performance. In this article, Fabiano Amorim shows how current wisdom about one counter, SQL Compilations/sec, can sometimes be misleading.
2021-08-20
Collecting SQL Server performance monitor data
SQL Server provides information for troubleshooting performance. Ed Pollack demonstrates collecting SQL Server performance monitor data.
2021-08-11
How to enable SQL Server trace flags
DBAs can control many aspects of SQL Server’s behavior with trace flags. In this article, Robert Sheldon explains how to enable SQL Server trace flags.
2021-07-30
Managing SQL Server transaction log size
The SQL Server transaction log must be managed to keep a database running and performing well. In this article, Greg Larsen explains how to manage the transaction log size.
2021-07-23
A Quick Diff Checker for SQL Server Databases
Compare the schemas of two SQL Server databases using SQL Compare command line then quickly produce a diff report showing you immediately which tables, views and functions have changed.
2021-07-02
SQL Server performance tuning: Nine best practices
SQL Server performance tuning can seem overwhelming when you don’t know where to start. In this article Robert Sheldon explains 9 best practices for performance tuning.
2021-06-16
Blogs
How to Find Expensive Queries in Amazon Redshift
Slow-running queries can degrade your Redshift cluster’s performance and lead to increased costs. Identifying...
The Notification Trap: How Input Fatigue Is Killing Deep Work in Tech
By gbargsley
If you've been here before, you know this blog is usually about SQL Server,...
Designing a Storage Load Test for SQL Server
I’ve been doing storage load tests for SQL Server for a long time, both...
Forums
SQL 2019 instance with AG, across 2 Windows 2016 OS servers - OSin-place upgrade
Hi all Can I get some perspective from the community please on performing in-place...
How Long is a Long I/O?
Comments posted to this topic are about the item How Long is a Long...
T-SQL Trigonometric Functions in SQL Server
Comments posted to this topic are about the item T-SQL Trigonometric Functions in SQL...
Question of the Day
How Long is a Long I/O?
In SQL Server 2025, a long I/O is recorded in the error log with message 833. How long much an I/O request be outstanding before this message is written to the log?
See possible answers