Skip navigation
Courses
Pricing
For Students
SQL Library
Articles
Cookbook
Cheat Sheets
For Beginners
Best Way to Learn SQL
SQL Primer
Flashcards
Guides
SQL Practice
GROUP BY and Aggregate Functions
SQL JOINs
Numeric Functions
Log in
Create free account
fullName
User profile menu open
Open user profile menu
fullName
Dashboard
My Profile
Payment & Billing
Log out
MENU
CLOSE
Courses
Pricing
For Students
Articles
Cookbook
Cheat Sheets
Best Way to Learn SQL
SQL Primer
Flashcards
SQL Practice
GROUP BY and Aggregate Functions
SQL JOINs
Numeric Functions
Dashboard
My Profile
Payment & Billing
Log in
Create free account
Log out
Articles
Cookbook
3 Jul 2020
Rebecca McKeown
Why Learn SQL for iOS and Android Development?
App and program development with iOS and Android is a huge and rapidly growing field in the software world. While some developers get through their careers knowing only their chosen development language, there are plenty of reasons to add SQL to that skill set. Here at LearnSQL.com, we are often asked: “why Learn SQL for iOS and Android development?” To answer that question, we’ve put together a little explanation about exactly why learning SQL makes sense for those in the app development space.
Read more
2 Jul 2020
Jakub Romanowski
SQL Course of the Month – PostGIS
It's summer, and it's travel time ... at least it would be under normal conditions. The pandemic is still going on, but that doesn't stop us from dreaming about distant trips and visits to beautiful places. For now, most of us will have to do it on a map. Did you know that databases can store geographical data? With interactive maps, if you find a nice summer house on the internet, you can accurately track it and plan the best route there.
Read more
1 Jul 2020
Marcin Koryszewski
Listen to These 7 SQL Podcasts
Are you learning SQL online but craving more? If you're looking for a way to squeeze some sweet SQL knowledge into your day, try listening to a SQL podcast. Choose one of our picks and get ready to amp up your SQL game! If you're like me, you like to get deep into a topic. You’re practicing it whenever there’s an opportunity. Of course, It’s hard to make time. I cherish the days I’m able to sit down and just get some hands-on learning done.
Read more
1 Jul 2020
LearnSQL.com Team
New SQL Monthly Challenge for July 2020!
The new LearnSQL.com Monthly Challenge is ready! In July, we invite you to sharpen your SQL skills with some questions about US states. If you’ve never come across our Monthly Challenge, it’s a set of 5 to 10 SQL exercises prepared for people who want to practice their SQL skills. Each challenge is designed around a specific theme. In this challenge, you’ll use SQL to learn facts about some US states.
Read more
30 Jun 2020
Kateryna Koidan
How ORDER BY and NULL Work Together in SQL
Do NULL values come first or last when you use ORDER BY? Are they considered higher or lower than non-NULL values? In this article, I’ll explain how different relational databases treat NULL values when sorting output and how to change the default behavior of the ORDER BY clause. When LearnSQL users practice the ORDER BY clause in our SQL Basics course, they often ask why NULL values appear first in the output and how they can change this behavior.
Read more
25 Jun 2020
Jakub Romanowski
How to Publish a LearnSQL.com Course Certificate on LinkedIn
LinkedIn draws both job seekers and recruiters. Showcasing your knowledge, skills, and experience on this professional networking site can lead to great opportunities. We know this well at LearnSQL.com. Have you finished one of our courses? Great! Tell your future employer about what you have learned. Here's a step-by-step how-to guide for publishing a course certificate on LinkedIn. I will show you how easy it is to publish a LearnSQL.
Read more
24 Jun 2020
Dorota Wdzięczna
Comparing TRUNCATE TABLE, DELETE, and DROP TABLE in SQL
What’s the difference between truncating, deleting, and dropping a table in SQL? Find out in this article. There are a lot of ways to delete data in SQL, including the DELETE, TRUNCATE TABLE and DROP TABLE commands. Which one should you use in a given situation? In this article, you’ll learn the syntax of each command in different database engines like MySQL, PostgreSQL, SQL Server, and Oracle. And you’ll understand the DROP TABLE vs.
Read more
23 Jun 2020
Kate Stolarek
How to Learn the SQL Syntax
Read about what SQL is, and choose the best way for you among a wide variety of possibilities for learning SQL and remembering its syntax. What Is SQL? “SQL” stands for “Structured Query Language,” and as it sounds, it is a language dedicated to querying a relational database. In practice, it is used for creating, designing, and managing a relational database. People use SQL to: Create sets of tables and rows Modify database tables and index structures Insert, update, and delete data Retrieve information from a database for a variety of uses such as analytics Relational databases consist of a set of tables containing rows and columns of data.
Read more
18 Jun 2020
Jakub Romanowski
A Mathematician in the World of SQL
She has a PhD in Mathematics and over 10 years’ experience teaching mathematics and computer science at the University of Warsaw. She knows SQL better than just about anyone I’ve met. Let’s get to know Agnieszka Kozubek-Krycuń, Vertabelo’s Chief Content Officer at Vertabelo. Let's go back in time. How did your adventure with math start? I’ve always enjoyed abstract concepts and problem solving. I was fascinated by variables when we learned to solve simple equations like x+2=5 in primary school.
Read more
17 Jun 2020
Adrian Więch
Last-Minute Preparation Tips for a Database Class Exam
Getting to learn SQL is fun. You don’t really need to spend much time to understand some basic SQL concepts and use them fluently. If you’re a student facing your first database class exam soon, we’ve got you covered. In this article, we explain what you should focus on while learning SQL and studying for an entry-level database exam. Check your knowledge with our 10 sample questions and discover where you can find more SQL practice.
Read more
««
«
1
2
3
58
59
60
79
»
»»