GREATEST in MySQL - Examples & AI Generator

MySQL’s GREATEST function helps you find the highest value among two or more columns or expressions—vital for reporting, ranking, and conditional business logic. Yet, GREATEST’s syntax can differ between database platforms, and memorizing MySQL’s quirks is often a pain for multi-database developers and analysts. AI2sql removes the guesswork by generating ready‑to‑use GREATEST queries from plain English in seconds—no coding required.

GREATEST Syntax in MySQL

The MySQL GREATEST function compares two or more expressions and returns the one with the highest value. It works with strings, numbers, and dates.

Syntax

GREATEST(expr1, expr2 [, exprN...])

• At least two expressions are required.

• If any argument is NULL, the result is NULL.

• Slightly different from other SQL flavors (e.g., NOT supported in SQL Server), so MySQL syntax awareness is crucial.

GREATEST Examples You Can Generate Instantly

Here are some practical business scenarios using GREATEST in MySQL. Each example is copy-paste ready for your workflow:

1. Find the Most Expensive Product Price (across columns)

SELECT product_id, GREATEST(price_usd, price_eur, price_gbp) AS highest_price
FROM products;

2. Get Each Customer’s Most Recent Order Date

SELECT customer_id, GREATEST(order_date_standard, order_date_expedited) AS last_order
FROM orders;

3. Calculate Maximum Quarterly Revenue Per Store

SELECT store_id,
  GREATEST(q1_revenue, q2_revenue, q3_revenue, q4_revenue) AS max_quarterly_revenue
FROM sales_summary;

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Why Use AI2sql Instead of Manual GREATEST Coding

• No need to memorize MySQL GREATEST syntax

• Instant, accurate queries from plain-English prompts

• 50,000+ users across 80+ countries trust AI2sql for SQL generation

• Perfect for quick ad-hoc analysis and complex logic—zero coding required

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Conclusion

The GREATEST function in MySQL streamlines comparisons across any set of values. But remembering syntax nuances or quickly adapting queries for different business scenarios can slow down your workflow. With AI2sql, you generate production-ready GREATEST MySQL queries in just 10 seconds, no manual effort needed. Generate Your First Query Now—and leave SQL memorization behind.