Tips for Learning SQL on a Budget: Free Resources and Tools

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Structured Query Language, known as SQL, is a powerful language employed globally for managing and manipulating databases. Its knowledge is essential for those seeking a career in Data Analysis and related fields. However, we understand that not everyone has the budget to enroll in expensive courses. So, here are some tips for learning SQL with free resources and tools, with some SQL code snippets to help you get started.

1. Free Online Courses and Tutorials

There are numerous free online platforms that offer SQL courses. Websites like Codecademy, Khan Academy, and W3Schools have beginner-friendly SQL courses that you can start with. These platforms not only teach SQL commands but also provide an environment where you can practice your codes.

2. Online Books

There are also countless free online books that can aid your learning. They can be of great support to those who prefer reading over video lessons. Some recommended readings include ‘Learn SQL The Hard Way’ by Zed Shaw and ‘SQL Notes for Professionals’.

3. SQL Fiddle

SQL Fiddle is a tool that allows you to build and run queries without having to set up a database of your own. Here’s a simple SQL example:

Transact-SQL

CREATE TABLE Sales ( SalesID INT PRIMARY KEY, Product VARCHAR(100), Quantity INT, SaleDate DATE ); INSERT INTO Sales VALUES (1, 'Apple', 10, '2020-09-01'), (2, 'Banana', 20, '2020-09-02'), (3, 'Cherry', 30, '2020-09-03'); SELECT * FROM Sales;

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CREATE TABLE Sales ( SalesID INT PRIMARY KEY, Product VARCHAR(100), Quantity INT, SaleDate DATE );   INSERT INTO Sales VALUES (1, 'Apple', 10, '2020-09-01'), (2, 'Banana', 20, '2020-09-02'), (3, 'Cherry', 30, '2020-09-03');   SELECT * FROM Sales;

4. SQLite

SQLite is a lightweight, self-contained database system that is perfect for beginners. It’s simple to install and has a straightforward queriable interface. Here’s how you can create a table in SQLite:

Transact-SQL

CREATE TABLE Inventory ( ItemID INT PRIMARY KEY, ItemName VARCHAR(100), ItemQuantity INT );

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CREATE TABLE Inventory ( ItemID INT PRIMARY KEY, ItemName VARCHAR(100), ItemQuantity INT );

Conclusion

Learning SQL does not have to be expensive. With the right amount of dedication and the utilization of free resources, anyone can learn SQL and enhance their career opportunities in the tech industry.

The best part? Once you’ve got the basics down, there’s a myriad of advanced topics to delve into, from Database Indexing to Stored Procedures. So, start coding today!