Articles Cookbook
15 Oct 2024
Ekre Ceannmor

19 Aggregate Function Exercises

Solve these 19 SQL aggregate function exercises and sharpen your SQL skills! Practice using aggregate functions with GROUP BY, HAVING, subqueries, and more. Includes a solution and detailed explanation for each exercise. Aggregate functions are an important part of SQL. They allow you to calculate different statistics and generate reports that you would not have been able to with single-row operations like filtering. It’s important to practice aggregate functions often, as they are a crucial part of your SQL skill set.
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10 Oct 2024
Radu Gheorghiu

Building Analytical Data Pipelines with SQL

If you’re trying to build an analytical data pipeline, then SQL is the perfect tool for the job. It will help your organization build a data analytics foundation that turns data into business value. Why should you care about building data pipelines with SQL? This might sound like a technical challenge, but a strong data pipeline is one of the most essential tools for turning raw data into actionable insights.
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8 Oct 2024
Jakub Romanowski

What’s the Benefit of SQL in Business Analysis? 5 Practical Examples

Why do you need SQL in business analysis? Well, the short answer is that it makes your work more effective and efficient. In this article, I’ll show you some simple, real-world examples of how SQL can help your daily business analysis work. Are you a business analyst, or do you frequently analyze business data? Or are you planning to get into this field? Then I’d recommend you learn SQL. SQL (Structured Query Language) isn’t just the language of relation databases – it’s also the language of data analysis.
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7 Oct 2024
LearnSQL.com Team

Fall 2024 Track of the Season: SQL from A to Z

During Fall 2024, our main SQL track, SQL from A to Z, will be in the spotlight. In this article, we answer the most frequently asked questions about this track. At LearnSQL.com, our SQL courses are organized into tracks. A track is a sequence of courses designed to help you achieve a specific learning goal. The courses in the track are in a recommended order that progresses from the easiest to the most challenging.
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3 Oct 2024
Jakub Romanowski

5 Reasons You Shouldn't Become a Data Analyst

Data analysis is growing but it’s not for everyone. Before you become a data analyst, you need to be aware of the challenges. While it’s a great career, it requires specific skills and temperament. In this post, I’ll outline 5 reasons why being a data analyst may not be for you. Before we explore why becoming a data analyst may not suit everyone, it's important to highlight how rewarding this career can be.
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1 Oct 2024
Gustavo du Mortier

CTE vs. Temporary Table: What’s the Difference?

SQL offers you two options to handle complex queries efficiently: CTEs and temporary tables. Read on to weigh the pros and cons of CTEs vs. temp tables. In SQL (Structured Query Language), a common table expression (CTE) lets you define a subquery and assign a name to it so that it can be used within a main query. A temporary table is a database table that you create explicitly, like any other table – but with the particularity that it disappears when you close the database connection in which it was created.
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1 Oct 2024
Jakub Romanowski

Free Course of the Month: Blog & Traffic Data

Why practice SQL with real-life scenarios? We'll explain in this article – and we’ll show how you can do it for free during October 2024 with this LearnSQL.com course! SQL is the backbone of many data-driven applications and businesses. It's a powerful language that allows you to interact with databases, retrieve data, and make insightful decisions. If you're looking to improve your SQL skills, our Basic SQL Practice: Blog & Traffic Data course is the perfect opportunity.
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1 Oct 2024
LearnSQL.com Team

New Monthly SQL Practice for October 2024!

Ready for a new basic-level SQL challenge? This time, you will help Chef Adrian, the owner of an up-and-coming restaurant, Savory Seasons. Get ready to dive into the world of SQL queries as you help Chef Adrian analyze the performance of his kitchen and create the best experience for his guests! Welcome to the October SQL Practice course! In our October 2024 SQL Practice, you will meet Chef Adrian. He owns an up-and-coming restaurant, Savory Seasons, and seeks help in gaining deeper insights from his database.
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26 Sep 2024
Tihomir Babic

SQL Interview Cheat Sheet

Need to quickly reference all the fundamental knowledge for an SQL interview? Want to refresh your memory about an SQL concept? Our SQL Interview Cheat Sheet is your new best friend!    Preparing for an SQL interview requires brushing up on your SQL. But it’s very easy to get lost in all the SQL concepts you must review. In such situations, you need an easily browsable resource packed with SQL knowledge.
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24 Sep 2024
Gustavo du Mortier

Rolling Total in SQL: What It Is and How to Compute It

Calculating a rolling total in SQL is simple when you use window functions. These handy metrics are similar to running totals and moving averages, and they’ll help you build a clear picture of your data. In this article, we'll explain and explore rolling totals. In SQL, a rolling total is an important metric that helps you see how trends change over time, giving a clear picture of your data. It calculates a sum over a "
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