16.20 - Example: Adding a Derived Period Column to a Table - Teradata Database - Teradata Vantage NewSQL Engine

Teradata Vantage™ SQL Data Definition Language Syntax and Examples

Product
Teradata Database
Teradata Vantage NewSQL Engine
Release Number
16.20
Published
March 2019
Content Type
Programming Reference
Publication ID
B035-1144-162K
Language
English (United States)
Last Update
2019-05-24

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);