SQL

SQLServerCentral Article

How to filter non-existing records in SQL

  • Article

Introduction Developing predefined reports in addition to all the ad-hoc queries have been a part of my daily activities. Often I find my stakeholders asking me to prepare reports in which they want to know something that has never happened. It might sound strange, but yeah, that's what their point of concern is all about. […]

4.22 (9)

You rated this post out of 5. Change rating

2021-11-26 (first published: )

13,854 reads

SQLServerCentral Article

A User-Defined Function returns more rows

  • Article

The Problem Recently, while working with one of my clients, I came across a script in which I had to introduce a scalar User-Defined Function in the SELECT statement. The SELECT used to return around 750K records. However, after introducing the UDF, the row count significantly increased to 826K. There were no other changes made […]

4 (5)

You rated this post out of 5. Change rating

2019-10-14

4,844 reads

SQLServerCentral Article

Optimize Your SQL by Reformulating the Spec

  • Article

As SQL developers, we tend to think of performance tuning in terms of crafting the best table indices, avoiding scalar and table valued functions, and analyzing query plans (among other things). But sometimes going back to the spec and applying some properties of elementary math can be the best way to begin to improve performance of SQL queries which implement mathematical formulas. This article is a case study of how I used this technique to optimize my SQL implementation of the Inverse Simpson Index.

5 (3)

You rated this post out of 5. Change rating

2021-05-07 (first published: )

5,345 reads

Blogs

What to Know about Power BI Theme Colors

By

Power BI reports have a theme that specifies the default colors, fonts, and visual...

A Global Team Meeting

By

The last few years at Redgate we’ve had the entire (or most) of the...

A New Word: sayfish

By

sayfish – n. a sincere emotion that seems to wither into mush as soon...

Read the latest Blogs

Forums

What Do You Want to Learn?

By Steve Jones - SSC Editor

Comments posted to this topic are about the item What Do You Want to...

How to Rename a Column in SQL Server

By Nisarg Upadhyay

Comments posted to this topic are about the item How to Rename a Column...

Disable Memory Grant Feedback Persistence

By Steve Jones - SSC Editor

Comments posted to this topic are about the item Disable Memory Grant Feedback Persistence

Visit the forum

Question of the Day

Disable Memory Grant Feedback Persistence

In SQL Server 2022, how can I disable memory grant feedback persistence?

See possible answers