Example: Returning the Interval Value of a Derived Period - Analytics Database - Teradata Vantage

INTERVAL returns the interval value of a derived period called jobduration created using 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 INTERVAL(jobduration)MONTH(4) FROM employee;

returns:

    INTERVAL(jobduration) MONTH
  -----------------------------
                             16