不同数据库中两个表之间参照完整性的存储过程？

For two tables A and B, I'd like to implement referential integrity such that in tables A a foreign key's value must present in table B, while in table B a primary key can only be deleted or modified if that value does not present in table A. My requirement is that I'd like to have table A, and B as variable, and apply the procedure to any arbitrary instances of tables. That is, For two tables A and B, I'd like to implement r