LEAST in MySQL - Examples & AI Generator

The LEAST function in MySQL is powerful for comparing columns or expressions, but remembering its exact syntax and use cases can slow you down, especially when switching between databases. With AI2sql, you get instant, production-ready LEAST queries in 10 seconds—no manual coding required. Whether you’re a data analyst, SQL developer, or a database engineer, skip the memorization and get accurate results, fast.

LEAST Syntax in MySQL

Official Syntax

LEAST(expr1, expr2, ...)

LEAST returns the lowest value in a list of expressions. All arguments must have comparable data types—MySQL will convert as needed.

• Compares numbers, strings, or dates

• Returns NULL if any argument is NULL

• MySQL-specific: Works in SELECT, WHERE, ORDER BY and more

LEAST Examples You Can Generate Instantly

• 1. Customers: Find the cheaper of two product prices per order

  SELECT order_id, product_a_price, product_b_price,
    LEAST(product_a_price, product_b_price) AS lower_price
  FROM orders;

• 2. Employees: Identify the earliest of two possible start dates

  SELECT employee_id, hire_date, contract_start_date,
    LEAST(hire_date, contract_start_date) AS real_start
  FROM employees;

• 3. Products: Discounted price or fixed minimum—use the lowest

  SELECT product_id, price, discount_price, 15.00 AS min_allowed_price,
    LEAST(price, discount_price, 15.00) AS final_price
  FROM products;
  
  

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LEAST in MySQL: FAQ

• Q: Can LEAST compare different data types?
  A: MySQL will implicitly cast types if possible. For best results, keep argument types consistent.

• Q: What happens if one value is NULL?
  A: LEAST returns NULL if any argument is NULL.

• Q: Where can I use LEAST in a query?
  A: Anywhere expressions are allowed: SELECT, WHERE, ORDER BY, etc.

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