CEIL

CEIL(f) is ceiling, it returns the integer that is equal to or just more than f

CEIL(f) give the integer that is equal to, or just higher than f. CEIL always rounds up.

 CEIL(2.7)  ->  3
 CEIL(-2.7) -> -2

In this example we calculate the population in millions.

 
SELECT population/1000000 AS a,
       FLOOR(population/1000000) AS b
  FROM bbc

SELECT population/1000000 AS a,
       CEIL(population/1000000) AS b
  FROM bbc