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Articles
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1 Sep 2022
Kateryna Koidan
Learn SQL for Data Science With LearnSQL.com
If you are interested in a data science career and have looked at a few relevant job descriptions, you've probably noticed many leading tech companies expect their data scientists to know SQL. Let's see how you can learn SQL for data science and become more valuable to any data-driven organization. A data scientist is a complex technical role that expects a combination of the skills of a statistician, a business analyst, and an IT expert.
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1 Sep 2022
LearnSQL.com Team
New Monthly SQL Practice for September 2022!
This time, you will help Kate who runs an electronics store. Kate would like to gather some data to help her expand her business. She has hired you as an SQL specialist to help her out. Can you find out the average number of purchases made by each customer? Can you calculate the prices for customers with loyalty cards? The answers are in the database. You just need to figure out how to get them out using SQL functions.
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30 Aug 2022
Kateryna Koidan
How to Learn SQL for Marketing Analytics With LearnSQL.com
SQL is a valuable tool for any experts wanting to make data-driven decisions. Marketers are no exception. Let's explore how to design an effective learning path for SQL in marketing. SQL for marketing analytics is used to understand customers better and to increase the effectiveness of marketing campaigns. If you work in marketing and want to join other marketing experts who have already benefited from this tool, you need to learn SQL.
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25 Aug 2022
Lisandro Fernigrini
What's New in MS SQL Server 2022
Microsoft SQL Server 2022 is almost here! In this article, we’ll review what new enhancements and features will be coming to this popular relational database. The new version of MS SQL Server will become available almost three years after SQL Server 2019 was released. (You can learn more about the origins and different versions of SQL Server in A Brief History of MS SQL Server.) If you need to start implementing a software solution, there are plenty of changes and new features in SQL Server 2022 that makes it a great option.
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23 Aug 2022
Kamila Ostrowska
How to Learn SQL
It takes quite an effort to learn SQL or any new skill for that matter. But pushing hard is not enough to learn it successfully. You can sit for hours and still feel like you're not making progress. So, what do you do? Let it go or try even harder? I say: work smart, not hard. SQL (Structured Query Language) is one of the most popular programming languages. It is an invaluable tool in a world overflowing with data.
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19 Aug 2022
Jakub Romanowski
Summer 2022 Track of the Season: Creating Database Structure
Summer is a great time to learn something new! Have you heard about data engineering? It’s one of today’s hottest skills. In this article, I'll show you why we selected our Creating Database Structures track as our SQL Track of the Season – and why it’s your ticket to a new career! LearnSQL.com offers online SQL training tracks – logically structured and well-thought-out learning paths that will help you work towards becoming an SQL expert.
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18 Aug 2022
Tihomir Babic
An Overview of SQL Text Functions in Google BigQuery
Data analysts and Google BigQuery go hand in hand. Google's cloud data warehouse presents you with plenty of opportunities for using standard SQL text functions you can't avoid in your day-to-day work as a data analyst. BigQuery uses Google Standard SQL, an ANSI-compliant SQL dialect. This means you can use standard SQL text functions in BigQuery without needing to learn a variant of a given function. The Standard SQL Functions course is an excellent resource for learning those functions.
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16 Aug 2022
Alexandre Bruffa
PostgreSQL vs. MySQL: Is It Difficult to Switch?
So you know PostgreSQL, but the boss has decided to switch to MySQL. What are the differences between these two SQL dialects? We discuss PostgreSQL vs. MySQL in this article. PostgreSQL has gained popularity in the last decade, and many developers and database specialists learned PostgreSQL as their first SQL dialect. But PostgreSQL is not the only relational database; during your IT career, you will probably be asked to use another SQL dialect – like MySQL.
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11 Aug 2022
Tihomir Babic
How to Use Aggregate Functions in WHERE Clause
Filtering data according to the result of an aggregate function is a common data analysis task. So how do you use aggregates in the WHERE clause? We’ll dedicate this whole article to answering that question. Combining aggregate functions and filtering based on their results is often used in data analysis – e.g. showing branches with total sales above X, countries where the number of posts is lower than Y, students with an average score below Z, and so on.
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9 Aug 2022
Dmitri Vaitkun
What Is an SQL Query?
An SQL query is the most basic SQL command. It is a question you ask a database. In this article, we dive into the basics of SQL queries to kickstart your SQL journey with practical knowledge right away! SQL, or Structured Query Language, is a programming language designed to interact with databases. When you want to access data in a database, be it to alter, delete, add, or simply extract information, you use SQL.
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