Rounding functions and examples in MySQL

This article mainly describes the practical application of MySQL rounding, as well as the precautions worth attention in its actual operations and the description of its actual application code. The following is a detailed description of the main content of this article, I hope you will have a better understanding of it after browsing.

FLOOR (X)

1. Return the maximum integer not greater than X.

MySQL> select FLOOR (1.23);-> 1 MySQL> select FLOOR (-1.23);->-2

Note that the returned value is converted into a BIGINT!

CEILING (X)

2. Return the smallest integer value not less than X.

MySQL> select CEILING (1.23);-> 2 MySQL> select CEILING (-1.23);->-1

Note that the returned value is converted into a BIGINT!

ROUND (X)

3. Return an integer rounded to MySQL of parameter X.

MySQL> select ROUND (-1.23);->-1 MySQL> select ROUND (-1.58);->-2 MySQL> select ROUND (1.58);-> 2

Note that the returned value is converted into a BIGINT!

ROUND (X, D)

4. Return a number rounded to X with D as a decimal number. If D is 0, no decimal point or decimal point is returned.

MySQL> select ROUND (1.298, 1);-> 1.3 MySQL> select ROUND (1.298, 0);-> 1

Note that the returned value is converted into a BIGINT!