Glossary term
What is SQL (Structured Query Language)?
SQL stands for Structured Query Language.
The language for relational databases. Example: SELECT name FROM users WHERE id = 42;.
Learn it properly · System DesignLesson 5: SQL Basics Every System Designer NeedsBefore sharding, replicas or NoSQL, learn to use one relational database well. Tables and keys, the queries you will write every day, indexes and EXPLAIN, the N+1 trap, transactions, and the connection limit that takes databases down.