17.10 - Example: Adding a Table-Level Referential Constraint - 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)

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);