Articles Cookbook
13 Sep 2022
Tihomir Babic

Top 10 MySQL Interview Questions And Answers

You learned SQL and now you want to use this valuable skill to get a better job. Now it’s time to prepare for the job interview. We’ve got ten MySQL interview questions and answers to help you with that. In today's hyperconnected world, knowing how to deal with it has become a necessary skill. That’s why you probably learned (or want to learn) SQL: either your job requires it or you realized that you need SQL to get a better job.
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8 Sep 2022
Tihomir Babic

SQL Syntax

In today’s article, we’ll give you a walkthrough of core SQL syntax with a focus on the SELECT, INSERT INTO, UPDATE, and DELETE statements. SQL is a programming language designed specifically to communicate with databases. It allows you to get the data from a database or change the data within it. Like any programming language, SQL has a syntax you must adhere to. In other words, there are rules to follow regarding its commands if you want your code to work.
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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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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

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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