Choosing between PostgreSQL and MySQL is one of the first decisions you'll face when building a web application. Both are powerful, open-source relational databases — but they serve different needs. This postgresql vs mysql comparison will help you understand the key differences and pick the right one for your project.
The Quick Overview
MySQL is the world's most popular open-source database. It powers WordPress, Drupal, and countless PHP applications. It's fast, easy to set up, and has massive community support.
PostgreSQL is known as the "world's most advanced open-source database." It offers more features, stricter standards compliance, and handles complex queries better than MySQL.
Both are excellent choices. The right one depends on your specific needs.
PostgreSQL vs MySQL: Feature Comparison
Data Types
MySQL supports standard data types — integers, floats, strings, dates, and JSON (added in 5.7).
PostgreSQL supports everything MySQL does plus:
- Native JSON and JSONB (binary JSON with indexing)
- Arrays
- Hstore (key-value pairs)
- Network address types (inet, cidr)
- Geometric types
- Custom composite types
- Range types
-- PostgreSQL: Store and query JSON efficiently
CREATE TABLE products (
id SERIAL PRIMARY KEY,
name TEXT,
metadata JSONB
);
-- Query nested JSON data
SELECT name FROM products
WHERE metadata->>'category' = 'electronics'
AND (metadata->>'price')::numeric < 500;
If your application needs flexible data structures alongside relational data, PostgreSQL has a clear advantage.
Performance
MySQL excels at:
- Simple read-heavy workloads (blogs, CMS, e-commerce catalogs)
- High-concurrency reads with InnoDB
- Replication and read scaling
PostgreSQL excels at:
- Complex queries with multiple joins
- Write-heavy workloads
- Full-text search
- Geospatial queries (PostGIS)
- Analytical and reporting workloads
-- PostgreSQL: Window functions for analytics
SELECT
product_name,
monthly_sales,
AVG(monthly_sales) OVER (
ORDER BY sale_date
ROWS BETWEEN 2 PRECEDING AND CURRENT ROW
) AS moving_avg
FROM sales_data;
Rule of thumb: For simple CRUD apps, MySQL is often faster. For complex queries and mixed workloads, PostgreSQL wins.
Concurrency and Locking
This is where PostgreSQL truly shines.
MySQL (InnoDB) uses row-level locking but can escalate to table-level locks in some situations. Heavy write operations can block reads.
PostgreSQL uses Multi-Version Concurrency Control (MVCC) natively. Readers never block writers, and writers never block readers. This makes it significantly better for applications with heavy concurrent read/write operations.
Standards Compliance
PostgreSQL follows SQL standards strictly. Code written for PostgreSQL is more portable to other databases.
MySQL has historically been more relaxed about standards. For example, MySQL silently truncates data that exceeds column limits by default (though strict mode fixes this). PostgreSQL throws an error — which is actually better because it prevents data corruption.
When to Choose MySQL
Perfect For:
- WordPress and PHP applications — MySQL is the default, and most PHP frameworks have first-class MySQL support
- Simple web applications — blogs, landing pages, basic CMS sites
- Read-heavy workloads — content sites with millions of reads and few writes
- Shared hosting — nearly every hosting provider supports MySQL
- Quick prototyping — simpler setup and configuration
The MySQL Stack:
WordPress / Laravel / PHP → MySQL → Apache/Nginx
Most tutorials, plugins, and hosting plans assume MySQL. If you're building a standard website or WordPress-based project, MySQL is the path of least resistance.
When to Choose PostgreSQL
Perfect For:
- Complex data models — applications with many relationships and complex queries
- Financial and accounting systems — strict data integrity is critical
- Geospatial applications — PostGIS is the gold standard for location-based queries
- Data analytics — window functions, CTEs, and advanced aggregation
- JSON-heavy applications — JSONB outperforms MySQL's JSON implementation
- Django and Rails apps — both frameworks work excellently with PostgreSQL
The PostgreSQL Stack:
Django / Rails / Node.js → PostgreSQL → Nginx
If you're building a SaaS product, a data-driven application, or anything that needs complex queries, PostgreSQL is worth the slight extra setup complexity.
Installation Comparison
MySQL on Ubuntu:
sudo apt update
sudo apt install mysql-server -y
sudo mysql_secure_installation
# Create a database and user
sudo mysql -e "CREATE DATABASE myapp;"
sudo mysql -e "CREATE USER 'appuser'@'localhost' IDENTIFIED BY 'strongpassword';"
sudo mysql -e "GRANT ALL PRIVILEGES ON myapp.* TO 'appuser'@'localhost';"
PostgreSQL on Ubuntu:
sudo apt update
sudo apt install postgresql postgresql-contrib -y
# Create a database and user
sudo -u postgres createuser --interactive appuser
sudo -u postgres createdb myapp -O appuser
# Set password
sudo -u postgres psql -c "ALTER USER appuser PASSWORD 'strongpassword';"
Both take under five minutes to install and configure.
Backup and Recovery
MySQL:
# Backup
mysqldump -u root -p myapp > backup.sql
# Restore
mysql -u root -p myapp < backup.sql
PostgreSQL:
# Backup
pg_dump myapp > backup.sql
# Restore
psql myapp < backup.sql
# Binary backup (faster for large databases)
pg_basebackup -D /backups/base -Ft -z
PostgreSQL's pg_basebackup and point-in-time recovery (PITR) give it an edge for production backup strategies.
Cost and Hosting
Both databases are free and open-source. The hosting landscape differs slightly:
- MySQL is available on virtually every hosting plan, including shared hosting at $3-5/month
- PostgreSQL is available on most VPS plans and cloud platforms, but less common on budget shared hosting
On a VPS from DeployBase, you can run either database with full control over configuration and performance tuning.
The Verdict
| Factor | MySQL | PostgreSQL |
|---|---|---|
| Ease of setup | ✅ Simpler | Good |
| WordPress/PHP | ✅ Default | Possible but uncommon |
| Complex queries | Good | ✅ Superior |
| JSON support | Basic | ✅ Advanced (JSONB) |
| Data integrity | Good | ✅ Stricter |
| Concurrency | Good | ✅ Better MVCC |
| Community/tutorials | ✅ Larger | Growing fast |
| Hosting availability | ✅ Universal | Most VPS/cloud |
Choose MySQL if you're building WordPress sites, simple web apps, or need maximum hosting compatibility.
Choose PostgreSQL if you're building complex applications, need advanced data types, or require strict data integrity.
Get Started with Either Database on DeployBase
Whether you choose PostgreSQL or MySQL, you need a server that can handle your database workload efficiently. At DeployBase, our VPS plans come with full root access, NVMe SSD storage for fast database I/O, and the flexibility to install and configure either database exactly how you need it.
Starting at $5/month with automated backups and 24/7 support, DeployBase gives you the infrastructure foundation your application deserves.
Get your VPS at DeployBase → — optimized hosting for any database stack.
