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. […]

(9)

You rated this post out of 5. Change rating

2021-11-26 (first published: )

15,565 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 […]

(5)

You rated this post out of 5. Change rating

2019-10-14

5,114 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.

(3)

You rated this post out of 5. Change rating

2021-05-07 (first published: )

5,389 reads

Blogs

SQL, MDX, DAX – the languages of data

By

Ramblings of a retired data architect Let me start by saying that I have...

Setting PK Names in Redgate Data Modeler

By

A customer was testing Redgate Data Modeler and complained that it auto-generated PK names....

Flyway Tips: AI Deployment Script Descriptions

By

With the AI push being everywhere, Redgate is no exception. We’ve been getting requests,...

Read the latest Blogs

Forums

Connecting Power BI to SSAS and effective user not working

By Paul Hernández

Hi everyone, Below is a consolidated summary of what we validated Architecture & data...

High Availability setup - has anyone seen this method?

By Paul Lancaster

Hi all, I recently moved to a new employer who have their HA setup...

Semantic Search in SQL Server 2025

By Deepam Ghosh

Comments posted to this topic are about the item Semantic Search in SQL Server...

Visit the forum

Question of the Day

Encoding URLs

I have this data in a SQL Server 2025 table:

CREATE TABLE Response
( ResponseID INT NOT NULL CONSTRAINT ResponsePK PRIMARY KEY
, ResponseVal VARBINARY(5000)
)
GO
If I want to get a value from this table that I can add to a URL in a browser, which of these code items produces a result I can use?

See possible answers