External Article

Index Scans and Table Scans

There are several things that you can do to improve performance by throwing more hardware at the problem, but usually the place you get the most benefit from is when you tune your queries. One common problem that exists is the lack of indexes or incorrect indexes and therefore SQL Server has to process more data to find the records that meet the queries criteria. These issues are known as Index Scans and Table Scans.

External Article

Purging Data from a Large Table in SQL Server

Purging data from a table is a common database maintenance task to prevent it from growing too large or to stay in compliance with data retention. When dealing with small amounts of data, this can be accomplished by a simple delete with no issues; however, with larger tables, this task can be problematic. Deleting records requires a lock that can block other processes from writing or even reading the data (depending on your isolation level). In this article I will share a technique I have used to work with some very large tables.

Blogs

T-SQL Tuesday #197 – An impactful session or two from a conference – RECAP

By

Thanks to everyone who joined the blog party this month. I noticed three themes...

OpenClaw- Agentic Engineering

By

This week has training on AI – Cyber security experts – Omar Santos and...

Visualising Vectors in High Dimensional Space

By

Following on from my previous post on building The Burrito Bot, I want to...

Read the latest Blogs

Forums

What's new in R 4.6

By Steve Jones - SSC Editor

Comments posted to this topic are about the item What's new in R 4.6

Interesting Changes in R

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Interesting Changes in R, which...

PostgreSQL String Functions Part 1

By Shivayan Mukherjee

Comments posted to this topic are about the item PostgreSQL String Functions Part 1

Visit the forum

Question of the Day

Identities and Sequences V

When thinking about the identity property and sequence objects, which of these can generate values before an insert statement is executed?

See possible answers