the row values updated or deleted either do not make the row unique or they alter multiple rows

Question

I want to delete row and I get this error:

the row values updated or deleted either do not make the row unique or they alter multiple rows

Answer 1

SQL Studio cautiously tries to delete exactly one row but finds no way to identify it. Contrary to what it's UI may tempt you to suppose, row can't be identified by it's position in the result set.