2025-10-22
145 reads
Data Quality
The Fake Speakers
Someone generated a fake speaker profile for their conference, which Steve finds disturbing.
2023-12-02
555 reads
Email Validation Simplified with Web API and SSIS
Email based validation is more than just a simple RFC check, this is where Melissa's Global Email Verification with a web-based API and SSIS delivers valuable data to SQL Server Professionals.
2020-12-14
SQL Server Best Practices for Data Quality
Accurate data is imperative for an organization to conduct cost effective decision making. Like everything else, change is constant for your data. There is a need to cleanse and validate data when received and on a regular basis. Unfortunately, cleansing and validating data is difficult with the native SQL Server toolset. How do we leverage the SQL Server tool set to achieve these goals?
2020-01-03
Data Quality
Problems with data quality are easier and cheaper to prevent than to solve later. In this article, Joe Celko talks about data quality and where the issues tend to happen.
2018-12-20
2,693 reads
Data Quality - Addressing non-stated requirements
Producing a crib sheet for data quality drives a shared understanding of the data used to power the business.
2016-07-28
1,345 reads
Design : Find table with Identities with missing unique constraints
In an OLTP DB, other than an autogenerated Identity , there should be something else on the table which makes the non-identity data unique, as in, unique if you had to drop the ID column.
2016-02-03 (first published: 2016-01-22)
509 reads
Data Degradation
The other day at a conference, the subject of data degradation/corrosion arose. The speaker at the conference said that data in a database degraded or corroded over time. The statement was made as if degradation over time applied to all databases. I found this blanket statement to be misguided. Indeed, I think that data does degrade in some databases, but not all.
2009-05-14
2,180 reads
Getting A Clue About Your Databases
Got a new database you know nothing about? Here's my basic proposal on how to find interesting tables in it.
2009-01-09
10,752 reads
Taking the Temperature of Your Data
Enhanced model performance comes from extracting as much information content as possible… relative to the specific performance metrics you are using to measure success.
2008-02-12
2,257 reads
Blogs
T-SQL Tuesday #202 SQL Server Outage You’ll Never Forget: A Roundup
When I put together the invitation for T-SQL Tuesday #202, I wasn't sure what...
A Last Minute Trip to the EU
By Steve Jones
My life has some crazy travel stretches for sure. Between speaking, office visits, customer...
Part 3 of 3: Tuning DiskANN — R, Alpha, L, Beam Width, Recall and Latency
In Part 1, we saw how ‘Vamana’ represents vectors as nodes, connects them with...
Forums
Server-Level Table sizes
Comments posted to this topic are about the item Server-Level Table sizes
Optional Parameter Plan Optimization in SQL Server 2025: Fixing the Kitchen-Sink Search Procedure
Comments posted to this topic are about the item Optional Parameter Plan Optimization in...
Question of the Day
ORDER BY alias
There is a table tmp_tab:
CREATE TABLE tmp_tab ( id int, val int );
INSERT INTO tmp_tab VALUES (1, 1), (2, NULL), (3, 3), (4, 4), (5, 5);You want to order the rows ids by the following expression:
ISNULL(val, id) + 1Which of the following queries produces the expected ordering and why? (Select all correct) See possible answers