## Purpose

Declares an INTERVAL SECOND value in an expression.

## Syntax

- sign
- An optional minus sign to indicate a negative interval. The default is a positive interval.
- string
- One to four digits representing the number of seconds, optionally followed by a decimal point and 1 to 6 digits representing fractional seconds. The decimal point is required if the fractional seconds are included. Spaces and new line characters are not allowed between the apostrophes.For the digits representing the number of seconds, only digits are parsed and converted to numeric. For example, '1.05' is treated as '105'.

## ANSI Compliance

INTERVAL SECOND literals are partly ANSI SQL:2011 compliant.

The ANSI definition places the optional sign for the interval within the apostrophes; the Teradata implementation places the optional sign outside the apostrophes.

## Example: INTERVAL SECOND Literals

The following example adds an interval of 0.000001 seconds to the current system time.

SELECT INTERVAL '0.000001' SECOND + CURRENT_TIME; ( 0.0+Current Time) ------------------- 15:21:23+00.00

In the following query, the first decimal point is ignored and the result is an interval of 10.000001 seconds.

SELECT INTERVAL '1.0.000001' SECOND;