SQL, or Structured Query Language, is the standard language used to interact with relational databases. It allows you to read, add, update, and delete data stored in tables.
In this level, you’ll get a high-level understanding of what SQL is and why it’s important — before jumping into writing queries.
Databases store information in tables, and SQL helps you communicate with those tables. Whether you're retrieving a list of users or analyzing product sales, SQL gives you the tools to query the data efficiently.
This course will walk you through SQL step by step — starting with reading data using simple queries.
The Tables tab shows you the available table which you are able to query throughout this course in the coding pane to the right. Once you have completed the level, you can click the 'Next' button to take you to the next level. The 'Course Navigation' tab allows you to navigate to previous levels if you wish to revisit them.