The modulo operation returns the remainder left after one number is divided by another. Many database systems use the percent sign (%) for modulo, although exact syntax can vary by database platform.
Modulo is useful for identifying even and odd numbers, creating repeating groups, checking divisibility, and building certain analytical or business rules.
To identify employee IDs that are even numbers, the modulo operation can check whether EmployeeID divided by 2 leaves a remainder of zero.
SELECT
EmployeeID,
EmployeeName
FROM Employees
WHERE EmployeeID % 2 = 0;Modulo is useful for record grouping, alternating assignments, even/odd checks, periodic calculations, data sampling, and business logic.
- Modulo returns the remainder after division.
- % is commonly used for modulo.
- Modulo can identify even and odd numbers.
- Modulo is useful in conditional logic.
- Syntax can vary between database systems.
What does the modulo operator return?
It returns the remainder left after dividing one number by another.
How can modulo identify even numbers?
A number is even when dividing it by 2 produces a remainder of zero.