What Can You Do With SQL?

Knowing what SQL is used for makes it easier to stay motivated while learning the basics:

• Answer business questions — "Which products sold best last month?" "How many customers signed up per week?"
• Power applications — every time you log in, place an order, or save a setting, an application runs SQL behind the scenes.
• Build reports and dashboards — tools like Metabase, Looker Studio, Power BI, and Tableau are driven by SQL queries.
• Clean and prepare data — find duplicates, fix inconsistent values, and reshape data for analysis.
• Design data storage — decide how an application's data is organized, so it stays consistent and fast.
• Analyze large datasets — data warehouses such as BigQuery, Snowflake, and Redshift use SQL to query billions of rows.

You'll practice several of these in the project lessons at the end of each level.