SQL Server Escape an Underscore

Cover Image for SQL Server Escape an Underscore
Matheus Mello
Matheus Mello
published a few days ago. updated a few hours ago

SQL Server Escape an Underscore: Unleash the Power of the Backslash! 😎

Hey there, SQL enthusiasts and code ninjas! Have you ever found yourself baffled by the pesky underscore character while working with SQL Server? Don't worry, we've got your backslash covered! In this epic guide, we'll tackle the common issue of escaping the underscore in SQL Server queries, unleash easy solutions that will save you precious time, and empower you to rock your coding adventures! 🚀

The Underscore Mystery: 🕵️‍♀️

Picture this: you're constructing a mighty WHERE clause for your SQL query, searching for entries with a suffix that ends in _d. However, whenever you execute your query, it returns more results than you expected. What gives? It's time to unmask the villain behind this mystery!

In SQL Server, the underscore character (_) acts as a wildcard that matches any single character. So, when you use the LIKE operator with a pattern like %_d, it not only captures entries ending with _d but also includes entries with any character before the suffix. Sneaky, right? 😼

The Escape Plan: 🏃‍♂️

Escaping the underscore character in SQL Server is as simple as wielding the mighty backslash (\). By preceding the underscore with a backslash, you can prevent it from being recognized as a wildcard and make it literal. Let's see it in action:

WHERE Username LIKE '%\_d'

Brace yourselves! With just a single humble backslash, you've successfully escaped the _____! 💪

Common Pitfalls and Solutions: 🪓

Case of the Backslash Disappearing:

Ah, the treacherous case of the vanishing backslash. It's an unfortunate reality that sometimes your backslash might mysteriously vanish, leaving you hanging. Fear not, for we have the solution!

Simply double up on the backslashes and watch the magic unfold:

WHERE Username LIKE '%\\_d'

The Pride of Unicode: 🌍

Now, imagine a world of Unicode characters, where the underscore's reach extends even further! In such cases, the COLLATION of your database might influence pattern matching. To wrangle these wild characters, you can use the COLLATE clause along with a case-sensitive collation that treats the underscore literally. It's simpler than it sounds, really! 😉

WHERE Username LIKE '%_d' COLLATE Latin1_General_BIN

Let's Hear Your Adventures! 📣

We hope this guide has helped you unleash the power of the backslash and overcome the perplexing issues that surround escaping the underscore in SQL Server. Now, it's your turn to share your SQL escapades!

Did you encounter any other mind-boggling SQL Server quirks? How did you solve them? Don't keep those solutions to yourselves! Share your wisdom in the comments below and let's conquer the coding world together! 💡

So go forth, fellow SQL adventurers, and may the backslash be with you! 🤘


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