What is the difference between Scope_Identity(), Identity(), @@Identity, and Ident_Current()?

Question

I know Scope_Identity(), Identity(), @@Identity, and Ident_Current() all get the value of the identity column, but I woul

Answer 1

Here is another good explanation from the book:

As for the difference between SCOPE_IDENTITY and @@IDENTITY, suppose that you have a stored procedure P1 with three statements:
- An INSERT that generates a new identity value
- A call to a stored procedure P2 that also has an INSERT statement that generates a new identity value
- A statement that queries the functions SCOPE_IDENTITY and @@IDENTITY The SCOPE_IDENTITY function will return the value generated by P1 (same session and scope). The @@IDENTITY function will return the value generated by P2 (same session irrespective of scope).