17.10 - Example: Adding a Derived Period Column to a Table - Advanced SQL Engine - Teradata Database

Teradata Vantage™ - SQL Data Definition Language Syntax and Examples

Product
Advanced SQL Engine
Teradata Database
Release Number
17.10
Release Date
July 2021
Content Type
Programming Reference
Publication ID
B035-1144-171K
Language
English (United States)

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);