INTERVAL YEAR Literals - Advanced SQL Engine - Teradata Database

SQL Data Types and Literals

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Published
July 2021
Language
English (United States)
Last Update
2021-07-27
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B035-1143
lifecycle
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Product Category
Teradata Vantageā„¢

Declares an INTERVAL YEAR value in an expression.

Result type: INTERVAL YEAR Data Type

ANSI Compliance

INTERVAL YEAR 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' YEAR

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 years. 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 YEAR Literal

This example adds an interval of -2 years to the current system date. (For this example, assume the current system date is 11-03-1999.)

SELECT INTERVAL -'2' YEAR + CURRENT_DATE;
   
  (-2+Date)
-----------
1997/11/03