Question: I have a table: Now I want to make the columns user, email, address unique (together). How do I do this in MySql? Of course the example is just… an example. So please don’t worry about the semantics. Best ...

Question: I need an understanding of how to filter a list by a composite key with the conditions “contains” and “does not contain”. I have a list where entity is a class There is a similar second list. I need ...