17.10 - INTERVAL HOUR Literals - Advanced SQL Engine - Teradata Database

Teradata Vantageā„¢ - Data Types and Literals

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1143-171K
Language
English (United States)

Declares an INTERVAL HOUR value in an expression.

Result type: INTERVAL HOUR Data Type

ANSI Compliance

INTERVAL HOUR 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.

Syntax

INTERVAL [ sign ] 'string' HOUR

Syntax Elements

sign
An optional minus sign to indicate a negative interval. The default is a positive interval.
The sign must be outside the apostrophes that enclose string.
string
One to four digits representing the number of hours. Spaces and new line characters are not allowed between the apostrophes.
Only digits within the apostrophes are parsed and converted to numeric. For example, '1.05' is treated as '105'.

Example: INTERVAL HOUR Literal

This example subtracts an interval of 2000 hours from the current system timestamp.

SELECT CURRENT_TIMESTAMP - INTERVAL '2000' HOUR;

    (Current TimeStamp(6)- 2000)
--------------------------------
2003-01-28 09:27:08.180000+00:00