Articles Cookbook
1 May 2025
Jakub Romanowski

Exploring the Future of MS SQL Server Careers: Opportunities, Trends, and Growth

When people search for "the future possibility of a career in MS SQL Server," they’re usually looking for more than just reassurance – they want clarity. Is this a smart field to commit to? Will the jobs still be around in five or ten years? And if they double down on SQL Server, will it actually lead to better opportunities? The good news is that all signs point to yes – but the answers are more nuanced than a simple yes or no.
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1 May 2025
Jakub Romanowski

Free Course of the Month: 2025 Monthly SQL Practice Sets – Basic

Ready to sharpen your SQL skills with real-world challenges? We’ve got something special for you! Our 2024 Monthly SQL Practice Sets - Basic course is completely free throughout May 2025 – and it’s the perfect way to improve your SQL by doing, not just reading. Hey, got a minute? If you're looking to boost your SQL skills, now's the perfect opportunity. We've just made our 2024 Monthly SQL Practice Sets - Basic course completely free for the entire month of May 2025.
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30 Apr 2025
LearnSQL.com Team

New Monthly SQL Practice for May 2025!

Ready for our new SQL challenge? This time, we have prepared some slightly more difficult SQL tasks. Here’s the May’s SQL Practice course! This time, you will be helping Tiffany, the owner of an online course website. She’d like to analyze her business data – it’s the perfect opportunity to use your SQL skills. Can you find the average number of students enrolled in a course? Calculate the average number of total hours spent by all students on a course?
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29 Apr 2025
Agnieszka Kozubek-Krycuń

How to Use Google BigQuery to Practice SQL for Free

Want to practice SQL without installing anything or spending a dime? With Google BigQuery Sandbox, you can explore real datasets, write queries online, and build your SQL skills for free  –  no credit card required. This guide will show you how to get started step by step. What is Google BigQuery? Google BigQuery is a cloud-based data warehouse  –  a type of database made for storing and analyzing large amounts of data.
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24 Apr 2025
Jakub Romanowski

The Hidden Cost of bad SQL Queries: Performance and Business Impact

The cost of bad SQL queries isn’t just slow reports or laggy dashboards: it’s wasted server power, higher infrastructure bills, and even frustrated customers when things don’t load fast enough. If your database is working harder than it should, your business is paying the price. Let’s break down how inefficient queries hurt performance and why fixing them matters. Ever had a query that takes forever to run and wondered what's going on?
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22 Apr 2025
LearnSQL.com Team

The Most Useless SQL Queries (and What you Should do Instead)

They run. They return data. But they’re pointless. Here’s what not to write in SQL – and what to do instead. Some SQL queries run just fine – but that doesn’t mean they’re doing anything useful. In this article, we’ll walk through real examples of SQL queries that are valid, harmless-looking, and completely pointless. They waste resources, hide insights, or just add noise. For each one, you’ll see what’s wrong, and how to write a smarter alternative instead.
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17 Apr 2025
Agnieszka Kozubek-Krycuń

Free Databases for Beginners: Where to Start?

Not sure which database to start with? Here are the best free options for beginners along with why they’re great for learning SQL. If you're new to databases, one of the first questions you’ll probably ask is: Which database engine should I start with? With so many options available, it’s easy to feel overwhelmed. SQL databases power everything from small applications to massive enterprise systems, but not all of them are beginner-friendly.
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15 Apr 2025
Scott Davis

Sales Growth Dataset Exploration – Using the Data Analyst Cheat Sheet on Real Sales Data

Have you ever used the Data Analyst Cheat Sheet to analyze a business dataset? In this article, you can see the commands from the cheat sheet in action. I’ll explore a real-world sales dataset to answer 10 key business questions using SQL. Following the guidance from the SQL for Data Analysis Cheat Sheet, I’ll demonstrate how SQL queries can help analyze trends, measure performance, and extract meaningful insights from sales data.
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10 Apr 2025
Jakub Romanowski

Build a Product Inventory Dashboard With SQL

Keeping track of your inventory can be a headache, especially when stock shortages or excess products start causing problems. A product inventory dashboard built with SQL makes it easier to stay on top of stock levels, sales patterns, and reorder points. Instead of guessing when to restock or worrying about over-ordering, you can use data to make smarter decisions. With the right SQL queries, you’ll be able to monitor trends, track sales, and manage your inventory like a pro.
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8 Apr 2025
LearnSQL.com Team

Top 9 Free SQL Practice Resources

Want to sharpen your SQL skills without spending a dime? Here’s a list of the best free SQL practice resources to help you write queries, solve real-world problems, and improve your database expertise – for beginners and advanced users. Learning SQL is essential for anyone working with data, but practicing it effectively can be a challenge – especially if you don’t have access to a database. Fortunately, there are plenty of free SQL practice resources that let you write and test queries in interactive environments, tackle real-world datasets, and even prepare for technical interviews.
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