Inline edit - checking identical rows before updating

[LukasBreit]

If you have 2 rows in a table which differ only in one column and the user uses the inline-edit function, he is able to enter the same values for the differing column. So after the changes are saved both rows are completely the same. If you inline-edit one of them afterwards they are also changed both, because they have the same primary key (all columns). Is there a way to check before commiting the inline-edit changes whether there would be completely identical rows after commiting the changes?

[p91paul]

If you have any control over this database, I suggest you set a proper primary key and let the database handle duplicate checks.
Implementing this feature might be feasible on small tables, but a real trouble on big ones and IMHO beyond the scope of a db client.