What is SQL?
A language for communicating with databases, used to create, read, update, and delete data
Why It Matters
SQL is the standard language for most databases, making it essential knowledge for working with your app's data
Real-World Example
SELECT * FROM customers WHERE city = 'Melbourne' retrieves all Melbourne customers
Related Terms
Database
An organised collection of data that your application can store, retrieve, and update
PostgreSQL
A powerful, free, open-source database known for reliability and advanced features
Query
A request to retrieve, create, update, or delete data from a database
NoSQL
Databases that store data differently from traditional tables, often as flexible documents or key-value pairs
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Related Terms
Database
An organised collection of data that your application can store, retrieve, and update
NoSQL
Databases that store data differently from traditional tables, often as flexible documents or key-value pairs
PostgreSQL
A powerful, free, open-source database known for reliability and advanced features
Query
A request to retrieve, create, update, or delete data from a database
MongoDB
A popular NoSQL database that stores data as flexible documents similar to JSON
Schema
A blueprint that defines the structure of your data, including fields and their types