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⚡ Total XP: 0|💻 backend XP: 0

The Core Four

The CRUD of Databases. Master the fundamental commands—SELECT, INSERT, UPDATE, and DELETE—to manipulate and query your data like a pro.

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CRUD

The four pillars of data manipulation.

Data manipulation is the foundation of the backend. Master these four commands, and you can build almost any application.

1SELECT: Precision Retrieval

Don't just use SELECT *. Being precise about which columns you need reduces network traffic and memory usage, making your application faster and more efficient.

2The Power of WHERE

The WHERE clause is your filter. It allows you to target specific rows based on conditions (e.g., WHERE age > 18). It's what turns a massive pile of data into meaningful information.

3Safe Mutations

When updating or deleting, always write your SELECT query first to verify you are targeting the right rows. Only once you are sure, change the SELECT to UPDATE or DELETE.