How to round down to nearest integer in MySQL?

Question

How would I round down to the nearest integer in MySQL?

Example: 12345.7344 rounds to 12345

mysql\'s round() function rounds up.

Answer 1

SUBSTR will be better than FLOOR in some cases because FLOOR has a "bug" as follow:

SELECT 25 * 9.54 + 0.5 -> 239.00

SELECT FLOOR(25 * 9.54 + 0.5) -> 238  (oops!)

SELECT SUBSTR((25*9.54+0.5),1,LOCATE('.',(25*9.54+0.5)) - 1) -> 239