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FLOOR

Returns the largest round number that is less than or equal to <val>. The value is rounded to a decimal range defined by <dec>.

Syntax

FLOOR(<val>[, <dec>])
Parameter Description
<val> Valid values include column names, functions that return a column with numeric values, and constant numeric values.
<dec> Optional. An INT constant that defines the decimal range of the returned value. By default, FLOOR returns whole numbers.

Example

SELECT
    FLOOR(2.19, 1);

Returns: 2.1