Learn SQL
The language of data. Every app has a database. Every dashboard runs a query. Every business decision backed by data was shaped by SQL. It's the most underrated career multiplier in tech.Data literacy is non-negotiable
Product managers, marketers, designers, engineers — everyone touches data. SQL is the universal language for asking questions about it. If you can query a database, you can answer questions others can't.
It never goes away
SQL was invented in the 1970s and is more relevant today than ever. PostgreSQL, MySQL, BigQuery, Snowflake, DuckDB — the engines change, the language stays.
Backend fundamentals
Every web application stores data in a relational database. Understanding SQL means understanding how apps actually work under the hood — not just the front-end veneer.
Analytics and reporting
Dashboards, KPI reports, cohort analyses, funnel breakdowns — they're all SQL queries at their core. This skill turns you from someone who reads reports into someone who builds them.
None. SQL starts from SELECT and builds up.
Pair with Python for data pipelines, or explore data visualisation tools like Power BI and Tableau.