16.20 - Example: Adding a Table-Level Referential Constraint - 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

The first request adds a table-level Referential Constraint relationship on foreign key column a3 with column e1 in table e. Referential integrity is not enforced for this relationship.

The second request drops the foreign key Referential Constraint that was created by the first.

     ALTER TABLE a
     ADD FOREIGN KEY (a3) REFERENCES WITH NO CHECK OPTION e(e1);
    
     ALTER TABLE a
     DROP FOREIGN KEY (a3) REFERENCES e(e1);