For an instructor lead, in-depth look at learning SQL click below.
If you’re looking to start learning SQL or just searching for resources to enhance your SQL skills, you’re in the right place. Here, we present you a list of 10 essential resources to learn SQL online, full of interactive courses, informative blogs, and forums for discussion. Alongside, I will provide examples of SQL code snippets to give you an idea of what you’ll deal with while learning SQL.
1. Codecademy
Codecademy provides interactive and interesting course content for beginners, making it a great place to start your SQL journey. The 7-day free trial can be more than enough to get you started with SQL.
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-- SQL example to fetch all records from table SELECT * FROM Table_Name; |
2. Khan Academy
Khan Academy offers a section entirely dedicated to SQL, perfect for beginners. The site uses an interactive dialog shell that allows you to practice your SQL during the course.
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-- SQL example to fetch specific column(s) from table SELECT Column_Name FROM Table_Name; |
3. Coursera
If you’re looking for a more in-depth academic course, Coursera offers specialized SQL courses from universities around the globe. Some of these courses are free, while others require a small fee.
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-- SQL example to sort results in ascending order SELECT * FROM Table_Name ORDER BY Column_Name; |
4. SQLZoo
SQLZoo is another great and interactive way to learn SQL. It provides you with a sandbox DB so that you can practice SQL while learning.
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-- SQL example to filter results using WHERE clause SELECT * FROM Table_Name WHERE Condition; |
5. LeetCode
LeetCode is well-known for its challenges that prep for technical interviews, and its SQL track is no exception. They provide many interactive SQL problems to refine your SQL skills.
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-- SQL example to get a count of records SELECT COUNT(*) FROM Table_Name; |
6. SQLBolt
SQLBolt provides interactive SQL tutorials. The lessons are well-explained, and you get to exercise instantly on the browser.
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-- SQL example to join two tables SELECT * FROM Table1 INNER JOIN Table2 ON Table1.matching_field = Table2.matching_field; |
7. W3Schools
W3Schools has a well-structured SQL course that covers all the basic principles of SQL. The best part is seeing the outcome of your SQL on the browser itself.
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-- SQL example to combine results from multiple SELECT statements into a single result set SELECT column_name(s) FROM table1 UNION SELECT column_name(s) FROM table2; |
8. Mode Analytics
Mode Analytics offers SQL tutorial for data analysis. It is a good place to learn SQL with a data science perspective.
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-- SQL example to create a new table CREATE TABLE table_name ( column1 datatype, column2 datatype, column 3 datatype ); |
9. edX
edX is an open-source higher education platform. It hosts university-level courses in a wide range of disciplines, including SQL. It includes several self-paced SQL courses from top Universities like Harvard and MIT.
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-- SQL example to add a new row of data to a table INSERT INTO table_name (column1, column2, column3) VALUES (value1, value2, value3); |
10. Udemy
Udemy is an online course marketplace. You can find several SQL courses suited for different skill levels. Though the courses aren’t free, they regularly go on significant sales.
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-- SQL example to update data in a table UPDATE table_name SET column1 = value1, column2 = value2 WHERE some_column = some_value; |
Conclusion
The resources mentioned above are some of the best to learn SQL online. Starting from the basics and leading up to complex commands and database management, these will help you master SQL, an essential skill in today’s data-driven world. Don’t postpone, start querying today!