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Cloud SQL & Firestore (Databases)

Last Updated: 10th September, 2026

Imagine you’re building a shopping app

You need to store:

  • User details
  • Product information
  • Orders & payments

If you store everything in files… it becomes messy and slow

You need a database

Now instead of setting up complex database servers, GCP gives you ready-to-use solutions

  • Cloud SQL → Structured data
  • Firestore → Flexible, real-time data

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What are Cloud SQL & Firestore?

Cloud SQL

fully managed relational database service

Supports:

  • MySQL
  • PostgreSQL
  • SQL Server

Firestore

NoSQL (non-relational) database

Stores data in:

  • Collections
  • Documents

SQL vs NoSQL

Feature

Cloud SQL

Firestore

TypeRelationalNoSQL
StructureTables & RowsCollections & Documents
FlexibilityFixed schemaFlexible schema
Best ForStructured dataReal-time apps

Technical Examples

Cloud SQL (Connect Example)

gcloud sql instances create my-sql-instance \
  --database-version=MYSQL_8_0 \
  --tier=db-f1-micro

Firestore (Basic Concept)

db.collection("users").add({
 name"Taniya",
age: 21
});

How They Work (Cloud SQL)

  1. Create database instance
  2. Define tables
  3. Store structured data

Firestore

  1. Create collections
  2. Add documents
  3. Access data in real-time

Real-Life Examples

1. E-commerce Apps

  • Cloud SQL → Orders, payments
  • Firestore → User sessions

2. Banking Systems

  • Cloud SQL for transactions
  • Structured and secure

3. Chat Applications

  • Firestore for real-time messages
  • Instant updates

4. Mobile Apps

  • Firestore syncs data instantly
  • Works offline + online
Module 2: Core GCP ServicesCloud SQL & Firestore (Databases)

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