SQL Cheatsheet: The Complete Guide for Data-Driven Careers (2025 Edition)
Structured Query Language (SQL) is a programming language used to manage and interact with data stored in relational databases. It allows users to store, retrieve, modify, and delete data efficiently.Think of SQL as the grammar of data. Just like we use grammar to write meaningful sentences, SQL helps us write commands to interact with data.Imagine your phone’s contact list: it stores names, numbers, and birthdays. Now imagine being able to quickly find all friends born in July or update a...