## Purpose

Declares an INTERVAL HOUR TO SECOND value in an expression.

## Syntax

- sign
- An optional minus sign to indicate a negative interval. The default is positive.
- string
- One to four digits representing the number of hours followed by a colon and two digits representing the number of minutes. This is followed by a colon and two digits representing the number of seconds, and 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 hours, only digits are parsed and converted to numeric. For example, '1.05' is treated as '105'.

## ANSI Compliance

INTERVAL HOUR TO SECOND literals are partly ANSI SQL:2011 compliant.

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

## Type

INTERVAL HOUR TO SECOND

For details on the INTERVAL HOUR TO SECOND type, see INTERVAL HOUR TO SECOND Data Type.

## Examples: INTERVAL HOUR TO SECOND Literal

The following example subtracts 12 hours, 37 minutes, and 12.123456 seconds from the current system time.

SELECT CURRENT_TIME - INTERVAL '12:37:12.123456' HOUR TO SECOND; (Current Time(0)- 12:37:12.123456) ---------------------------------- 05:07:11+00:00

In the following query, the first decimal point is ignored and the result is an interval of 10 hours, 30 minutes, and 12.123456 seconds.

SELECT INTERVAL '1.0:30:12.123456' HOUR TO SECOND;