Articles Cookbook
10 Apr 2024
LearnSQL.com Team

Your Guide to SQL Practice at LearnSQL.com

Explore a variety of SQL practice opportunities at LearnSQL.com and take your data analysis skills to the next level. Whether you're a beginner or an advanced user, our learning resources are designed to help you master SQL through hands-on learning and real-world usage scenarios. SQL, or Structured Query Language, is a powerful tool used extensively in data analysis. It allows you to access and manipulate databases quickly and efficiently. Whether you are working in finance, healthcare, tech, or almost any other industry, SQL helps you extract and analyze data.
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9 Apr 2024
Radu Gheorghiu

SQL IN Operator

Why do you need to know SQL IN? Find out what you can do with this small but powerful operator. The IN operator is a fundamental tool in SQL, enabling data analysts and developers to filter and retrieve specific subsets of data from databases. While its basic usage may seem straightforward, mastering the nuances and advanced applications of the SQL IN operator can greatly enhance your SQL skills and lead to more powerful and optimized queries.
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8 Apr 2024
LearnSQL.com Team

Does Data Analytics Require Coding

Thinking about a future in data analytics? You might be pondering the need for coding skills. Is it necessary to be good at programming? As the worlds of data analytics, technology, and data science merge, the importance of coding becomes clearer. It’s crucial to understand which programming languages are key and how much expertise you need, making the journey into this vibrant field less daunting. In this article, we're going to focus on the importance of coding, particularly SQL, for data analytics.
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4 Apr 2024
Martyna Sławińska

SQL Numeric Functions

Review all the SQL numeric functions, including their definitions and examples. SQL’s numeric functions perform operations on numbers. They take one or more numbers as arguments and return a number as output. Note that numbers may be of different data types, including integers, doubles, and floats. You can learn more about numeric and decimal data types here. SQL numeric functions can be divided into scalar and aggregate functions. Scalar functions compute a result for each input row individually.
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2 Apr 2024
Maria Durkin

Building a Data Analyst Portfolio: All You Need to Know

In a competitive job market, it is not enough to simply have the necessary skills; you must also demonstrate them. This is where a well-crafted data analyst portfolio comes into play. In data analytics, a portfolio is more than just a collection of projects; it serves as proof of an analyst's abilities and is critical to standing out. It demonstrates concrete capabilities in data cleaning, analysis, and visualization as well as the ability to effectively communicate insights.
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1 Apr 2024
Jakub Romanowski

Course of the Month: Revenue Trend Analysis in PostgreSQL

Need to understand what your data is saying about your business? In April 2024, our Free SQL Course of the Month is Revenue Trend Analysis in PostgreSQL. Don't miss this opportunity to elevate your analytical capabilities with a leading database system! Understanding revenue trends is crucial for business success, but effective data analysis can be challenging. Dive into the world of SQL reports and enhance your business growth strategies with PostgreSQL.
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31 Mar 2024
LearnSQL.com Team

New Monthly SQL Practice for April 2024!

In our April 2024 SQL Practice, you’ll meet Damien who manages a local art museum. He needs you to extract and present him with information to promote the museum. Will you use your SQL skills to help him? It should not be too hard if you have finished our SQL Basics course or otherwise understand core SQL concepts. Our interactive SQL course is a great way to test your skills and put what you have learned so far into practice.
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28 Mar 2024
Nicole Darnley

In-Person vs Online SQL Training for Data Analytics

If you want to become a data analyst, you’ll have to choose between in-person and online SQL training. Learn the pros and cons of each path in this article. Want to become a data analyst? First, you have to decide which learning method to choose – traditional, in-person classes or online courses. Technology has given us more options, leading to questions about the best fit for different learning styles and goals.
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26 Mar 2024
Gustavo du Mortier

How to Become a Big Data Engineer

What is a Big Data engineer, and how is their skill set different from a data engineer? In this article, we explore the tools and platforms you’ll need to master as a Big Data engineer. To move from being a regular data engineer to a Big Data engineer, you need to acquire several new skills and learn to use several new tools. The good news is that Big Data still lets you use your good old SQL skills to manipulate and get information from data repositories.
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21 Mar 2024
Tihomir Babic

15 Tricky SQL Interview Questions for Experienced Users

SQL interview questions for experienced users usually contain some trick(y) questions. Interviewers use them to test your gumption, which is typically a result of extensive experience and a high level of SQL knowledge.  I will show you 15 tricky SQL interview questions (mostly coding) in this article. Mind you, these are not necessarily complex questions. Actually, that’s their main characteristic: they seem very easy and straightforward, but that’s the interviewer trying to deceive you.
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