Example - Advanced SQL Engine - Teradata Database

LAST returns the last value of a derived period called jobduration created by the following SQL statement:

CREATE TABLE employee(id INTEGER,
                      name VARCHAR(50),
                      jdbegin DATE NOT NULL FORMAT 'YYYY-MM-DD',
                      jdend   DATE NOT NULL FORMAT 'YYYY-MM-DD',
                      PERIOD FOR jobduration(jdbegin,jdend)
  )PRIMARY INDEX(id);

When the following values are inserted into the employee table:

INSERT INTO employee(1025,'John',DATE'2011-01-02',DATE'2012-05-02');

the following SQL statement:

SELECT LAST (jobduration) FROM employee;

returns:

       LAST(jobduration)
------------------------
              2012-05-01