MySQL + SQL · Lesson 62
ROUND, CEIL and FLOOR Functions
Rounding Numbers
These three control how decimal numbers are rounded.
How Each Works
| Function | Rule | Example |
|---|---|---|
| ROUND(x,n) | nearest, n decimals | ROUND(7.456,1) → 7.5 |
| CEIL(x) | always up | CEIL(7.1) → 8 |
| FLOOR(x) | always down | FLOOR(7.9) → 7 |
Example
SELECT ROUND(AVG(marks),2) AS avg2,
CEIL(AVG(marks)) AS rounded_up,
FLOOR(AVG(marks)) AS rounded_down
FROM students;
Summary
- ROUND = nearest; CEIL = up; FLOOR = down.