The Hidden Danger of Wildcard Operators In Join Operations
This article looks at one of the killers of performance at scale, SELECT *.
2026-08-14
2,299 reads
JOIN
2024-11-13
531 reads
2023-08-04
472 reads
Learn about SQL Joins on Multiple Columns
Learn about joining SQL Server tables together for a query when there is a need to join on multiple columns.
2021-12-27
Join SQL Server tables where columns include NULL values
Dealing with NULL values especially when joining tables can become a challenge. Let's take a look at this issue and how this can be resolved.
2021-09-01
Join Two CSV Files with a Common Column
In this example we will join two CSV files with a common column using SQL Server.
2017-01-23
7,495 reads
SQL Server JOIN Hints
You, as a SQL Server data professional, are looking for ways to improve your queries. You've done the usual - avoided cursors and loops, used locks effectively, examined execution plans - what else can you tweak? Check out this tip to learn more.
2013-04-08
6,542 reads
2012-02-20
2,429 reads
2009-12-07 (first published: 2009-11-12)
3,100 reads
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Au Revoir for now
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No, I’m not quitting or retiring. Just going on vacation, but I leave tonight...
The SUM of Nothing: #SQLNewBlogger
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I caught this interesting item over on Pinal Dave’s blog: Eleven Interview Questions that...
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Building a SQL Server Fleet Audit That Leadership Actually Reads
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Smart AI Agents and Data Security
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RegEx Functions IV
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Question of the Day
RegEx Functions IV
I have this data in a table in a SQL Server 2025 database:
EmailAddressID EmailAddress 7 [email protected] 8 [email protected]If I run this query, which row(s) are returned?
SELECT top 10 * FROM person.EmailAddress WHERE REGEXP_LIKE(EmailAddress, '^D', 'i') AND BusinessEntityID IN (7,8)See possible answers