Скачать или смотреть Stop Writing Programs. Start Asking Questions | SQL Explained | CS for Everyone #8

Before databases, programs manually searched data stored in files.
Every query required writing logic: open file → scan records → filter → match → collect results.

It worked… but it was slow, complex, and error-prone.

SQL changed the relationship between humans and computers.

Instead of telling the machine *how to find data*, we simply describe *what data we want*.

Using a library system example (Books, Users, Records), we compare:

Traditional file processing (.dat logic)
vs
SQL queries that express intent directly

You’ll understand why databases power almost every modern application and why SQL remains one of the most important technologies ever created.

Next: how relational thinking models real-world relationships.

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