15.10 - Example: Adding a Table-Level Referential Constraint - Teradata Database

Teradata Database SQL Data Definition Language Syntax and Examples

Product
Teradata Database
Release Number
15.10
Published
December 2015
Content Type
Programming Reference
Publication ID
B035-1144-151K
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);