17.00 - 17.05 - Example - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Date and Time Functions and Expressions

Product
Advanced SQL Engine
Teradata Database
Release Number
17.00
17.05
Release Date
June 2020
Content Type
Programming Reference
Publication ID
B035-1211-170K
Language
English (United States)

RDIFF is used to find the right difference of the first Period expression with the second Period expression.

Assume the query is executed on the following employee table where period1 and period2 are PERIOD(DATE) columns:

SELECT ename, period2 RDIFF period1 FROM employee;
ename   period1                        period2
-----   ----------------------------   ----------------------------
Adams   ('2005-02-03', '2006-02-03')   ('2005-02-03', '2006-02-03')
Mary    ('2005-04-02', '2006-01-03')   ('2005-02-03', '2006-02-03')
Jones   ('2001-01-02', '2003-03-05')   ('2002-03-05', '2004-10-07')
Randy   ('2006-01-02', '2007-03-05')   ('2004-03-07', '2005-10-07')
Simon   ?                              ('2005-02-03', '2005-07-27')

The result is:

ename   (period2 RDIFF period1)
-----   ----------------------------
Adams   ?
Mary    ('2006-01-03', '2006-02-03')
Jones   ('2003-03-05', '2004-10-07')
Randy   ?
Simon   ?