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

Use FLOOR(), if you want to round your decimal to the lower integer. Examples:

FLOOR(1.9) => 1
FLOOR(1.1) => 1

Use ROUND(), if you want to round your decimal to the nearest integer. Examples:

ROUND(1.9) => 2
ROUND(1.1) => 1

Use CEIL(), if you want to round your decimal to the upper integer. Examples:

CEIL(1.9) => 2
CEIL(1.1) => 2

Answer 2

Use FLOOR:

SELECT FLOOR(your_field) FROM your_table

Answer 3

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

Answer 4

if you need decimals can use this

DECLARE @Num NUMERIC(18, 7) = 19.1471985
SELECT FLOOR(@Num * 10000) / 10000

Output: 19.147100 Clear: 985 Add: 00

OR use this:

SELECT SUBSTRING(CONVERT(VARCHAR, @Num), 1, CHARINDEX('.', @Num) + 4)

Output: 19.1471 Clear: 985

Answer 5

Try this,

SELECT SUBSTR(12345.7344,1,LOCATE('.', 12345.7344) - 1)

or

SELECT FLOOR(12345.7344)

SQLFiddle Demo

Answer 6

It can be done in the following two ways:

• select floor(desired_field_value) from table
• select round(desired_field_value-0.5) from table

The 2nd-way explanation: Assume 12345.7344 integer. So, 12345.7344 - 0.5 = 12345.2344 and rounding off the result will be 12345.