# FLOOR
<a name="sql-reference-floor"></a>

```
FLOOR ( <time-unit> )
```

When called with a numeric argument, FLOOR returns the largest integer equal to or smaller than the input argument.

When called with a date, time, or timestamp expression, FLOOR returns the largest value equal to or smaller than the input, subject to the precision specified by <time unit>.

FLOOR returns null if any input argument is null.

## Examples
<a name="sqlref-floor-examples"></a>


|  Function  |  Result  | 
| --- | --- | 
|  FLOOR(2.0)  |  2  | 
|  FLOOR(-1.0)  |  -1  | 
|  FLOOR(5.2)  |  5  | 
|  FLOOR(-3.3)  |  -4  | 
|  FLOOR(-3 \$1 3.1)  |  -10  | 
|  FLOOR(TIMESTAMP '2004-09-30 13:48:23' TO HOUR)  |  TIMESTAMP '2004-09-30 13:00:00'  | 
|  FLOOR(TIMESTAMP '2004-09-30 13:48:23' TO MINUTE)  |  TIMESTAMP '2004-09-30 13:48:00'  | 
|  FLOOR(TIMESTAMP '2004-09-30 13:48:23' TO DAY)  |  TIMESTAMP '2004-09-30 00:00:00.0'  | 
|  FLOOR(TIMESTAMP '2004-09-30 13:48:23' TO YEAR)  |  TIMESTAMP '2004-01-01 00:00:00.0'  | 

## Notes
<a name="sqlrf-floor-notes"></a>

**Note**  
FLOOR ( <datetime expression> TO <timeunit> ) is an Amazon Kinesis Data Analytics extension.  
The STEP function is similar to FLOOR but can round values down to arbitrary intervals, such as 30 seconds. For more information, see [STEP](sql-reference-step.md).