15.10 - Example: Adding a Derived Period Column to a Table - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

prodname
Teradata Database
vrm_release
15.10
created_date
December 2015
category
Programming Reference
featnum
B035-1144-151K

This example modifies a table to add a derived period column.

Here is the table definition for this example.

CREATE TABLE employee (
eid INTEGER NOT NULL,
name VARCHAR(100) NOT NULL,
deptno INTEGER NOT NULL,
jobstart DATE NOT NULL,
jobend DATE NOT NULL
) PRIMARY INDEX(eid);

This following statement modifies the table, employee, to add a derived period column, jobduration, with jobstart as the period start column and jobend as the period end column.

ALTER TABLE employee ADD PERIOD FOR jobduration(jobstart, jobend);