For an instructor lead, in-depth look at learning SQL click below.
If there’s one thing that truly separates successful businesses from the rest, it’s the ability to translate raw data into meaningful insights. In an era where data is the new oil, SQL (Structured Query Language) is the essential tool for drilling. Let’s dive into some of the top SQL courses that can catapult your data analytics skills to new heights.
1. Khan Academy’s “Intro to SQL: Querying and managing data”
This is a comprehensive course for beginners. It covers the basics such as simple queries, multi-table queries, and table creation/modification. Here’s a simple SELECT statement you’ll learn according to the course syllabus:
|
1 2 3 |
SELECT * FROM Customers; |
This code snippet retrieves all data from the “Customers” table.
2. Codecademy’s “Learn SQL”
Codecademy is renowned for its interactive learning style. This course covers SQL commands for data manipulation, complex queries, and database management. To illustrate, here’s a more complex JOIN query example:
|
1 2 3 4 5 6 |
SELECT Orders.OrderID, Customers.CustomerName FROM Orders INNER JOIN Customers ON Orders.CustomerID=Customers.CustomerID; |
This SQL statement retrieves the OrderID from the Orders table and the CustomerName from the Customers table, for records where the CustomerID matches in both tables.
3. SQLZoo’s Interactive SQL Tutorial
SQLZoo’s learning-by-doing SQL tutorial covers all essential areas including selects, joins, and subqueries. Throughout the courses, you will be able to use the built-in SQL interpreter to see the results of your queries immediately. For instance, here’s a SUBQUERY example related to this course:
|
1 2 3 4 5 6 7 8 |
SELECT name FROM world WHERE population > (SELECT population FROM world WHERE name='Russia'); |
This SQL code snippet fetches the names of countries with a population greater than Russia from the ‘world’ table.
Wrap Up
Understanding and analyzing data is key in making informed business decisions. With tools such as SQL in our arsenal, we can unlock significant insights that can drive business growth. They say that the best way to learn something is by actually doing it. Hence, while taking these courses, make sure to get your hands dirty and practice SQL code as much as you can. Happy learning!