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.
- 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