Category: SQL
SQL Tutorial 3: Retrieving Data with SELECT
Learn to retrieve exactly the columns you need with SELECT, rename them with aliases, remove duplicate rows with DISTINCT, and cap result size with LIMIT. Stop shipping SELECT…
SQL Tutorial 2: Master the Core Commands (SELECT, INSERT, UPDATE, DELETE)
Master the four core SQL commands: SELECT to read, INSERT to add, UPDATE to change, and DELETE to remove. Learn the safety habits that keep practice useful and…
SQL Tutorial 1: Setting Up Your SQL Playground
Set up a low-drama SQL playground with SQLite first, then compare common engines for later work. Create the toy customers and orders tables in your head and on…
SQL for Beginners: What is SQL and Why You Should Learn It
SQL is how you ask a database for answers instead of scrolling forever. This intro explains tables, the toy customers and orders schema, why SQL still matters at…
