The FOREIGN KEY constraint is used to enforce a link between the data in two tables. A foreign key in one table points to a primary key in another table, maintaining referential integrity.

values in a column or a group of columns in the child table EQUAL THE VALUES in a column or a group of columns of the parent table. As a result, the relationship between two tables involves two actors ...

I have a foreign key constraint that I created to reference the primary key of another table:<BR><BR><pre class="ip-ubbcode-code-pre">constraint geneassay_fk foreign ...