Content
GREATEST in PostgreSQL - Examples & AI Generator
GREATEST in PostgreSQL - Examples & AI Generator
When you want to find the largest value among several columns or expressions in PostgreSQL, the GREATEST function is your go-to tool. But remembering the exact PostgreSQL GREATEST syntax—or switching between different SQL dialects—can slow you down.
AI2sql offers an instant solution: just type your request in plain English and get production-ready queries in seconds—no manual coding, no memorization.
GREATEST Syntax in PostgreSQL
Standard Usage
The PostgreSQL GREATEST function returns the largest value from a list of expressions. Its syntax:
Accepts two or more arguments.
Arguments must be of comparable types (e.g., numbers, same text type).
If any argument is
NULL
, the result isNULL
.
GREATEST Examples You Can Generate Instantly
Instead of memorizing variations of GREATEST PostgreSQL syntax, see below for real-world usage. All examples are copy-paste ready:
1. Highest Sales Amount Per Customer
2. Latest Delivery Date Among Three Possible Dates
3. Highest Product Rating (Multiple Review Sources)
Generate GREATEST queries in 10 seconds with AI2sql
Why Use AI2sql Instead of Manual GREATEST Coding
Skip documentation: Get correct PostgreSQL GREATEST syntax instantly.
No coding errors: Natural language to tested SQL in only 10 seconds.
Supports 80+ countries: Trusted by 50,000+ users—AI2sql adapts to all major SQL dialects.
Try AI2sql Generator – or Learn GREATEST for more technical deep-dives.
Conclusion
The GREATEST function in PostgreSQL is essential for comparing multiple values in one row. But manual coding across varying SQL dialects is time-consuming, even for seasoned developers or analysts. AI2sql removes the guesswork, giving you optimized GREATEST queries in seconds—no coding, zero errors, ready for business uses.
Share this
More Articles

GUIDE
Is SQL Easier Than Python? A Practical Comparison for Data Beginners
May 29, 2025

GUIDE
Is SQL Easy to Learn? A Beginner’s Guide to Getting Started
May 29, 2025

GUIDE
Can I Learn SQL in 7 Days? A Step-by-Step Guide for Beginners
May 29, 2025

GUIDE
Is SQL Like Excel? Understanding the Key Differences and How AI2sql Bridges the Gap
May 29, 2025

GUIDE
What is SQL and Why is it Used? A Beginner’s Guide
May 29, 2025