Example - Analytics Database - Teradata Vantage

Assume that in the employee table, created by the following CREATE TABLE statement, jobdur1 and jobdur2 are derived period columns.

CREATE TABLE employee (
   eid INTEGER NOT NULL, 
   name VARCHAR(100) NOT NULL,
   deptno INTEGER NOT NULL,
   jobst1 DATE NOT NULL,
   jobend1   DATE NOT NULL,
   PERIOD FOR jobdur1(jobst1, jobend1),
   jobst2 DATE NOT NULL,
   jobend2   DATE NOT NULL,
   PERIOD FOR jobdur2(jobst2, jobend2)
   ) PRIMARY INDEX(eid);

In the following SQL statement, OVERLAPS is used with derived period columns of the employee table:

SELECT eid, name, jobst1, jobend1, jobst2, jobend2 
FROM employee 
WHERE jobdur1 OVERLAPS jobdur2;

The result is: