Example: AS OF Queries on an ANSI Valid-Time Table - Analytics Database - Teradata Vantage

ANSI Temporal Table Support

Deployment
VantageCloud
VantageCore
Edition
Enterprise
IntelliFlex
VMware
Product
Analytics Database
Teradata Vantage
Release Number
17.20
Published
June 2022
Language
English (United States)
Last Update
2023-10-30
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esa1472244798285
lifecycle
latest
Product Category
Teradata Vantage™

The following AS OF query retrieves all table rows that were valid at 2002-01-01.

SELECT * 
FROM employee_vt 
FOR VALIDTIME AS OF DATE’2002-01-01’;

Output:

 eid ename terms  job_start     job_end
---- ----- ----- ---------- -----------
1001 Sania  TW08 2002/01/01  2006/12/31
1004 Fred   PW12 2001/05/01  9999/12/31

Only Sania and Fred had jobs with valid-time periods that include 2002-01-01.

Temporal queries can specify times in the future to return the rows that will be, or will still be valid at a future time:

SELECT * 
FROM employee_vt 
FOR VALIDTIME AS OF DATE’2015-02-01’;

Output:

 eid ename terms  job_start     job_end
---- ----- ----- ---------- -----------
1005 Alice  PW11 2005/12/01  9999/12/31
1010 Mike   TW07 2015/01/01  2016/12/31
1004 Fred   PW12 2001/05/01  9999/12/31