17.10 - INTERVAL DAY 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 DAY value in an expression.

Result type: INTERVAL DAY Data Type

ANSI Compliance

INTERVAL DAY 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.

Syntax

INTERVAL [ sign ] 'string' DAY

Syntax Elements

sign
An optional minus sign to indicate a negative interval. The default is a positive interval.
Note that the sign must be outside the apostrophes that enclose string.
string
One to four digits representing the number of days. 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 DAY Literal

This example adds an interval of -30 days to the current system date. (For this example, assume the current system date is 1999-11-03).

SELECT INTERVAL -'30' DAY + CURRENT_DATE;

  (-30+Date)
------------
  1999/10/04