Is there a shortcut for 'SELECT * FROM table' in relational algebra? Problem

A question I once found on a test was worded as such:


  Report the book information for the book with ISBN=43221


The relational schema for a book is depicted below:

&pi;ISBN, title, type, NumPages, edition, sequel, name(&sigma;ISBN=43221(Book))

This is essentially the equivalent of 

SELECT * FROM Book WHERE ISBN=43221.


I wrote out all the attributes in the Projection statement on the test, but I had the feeling there was a quicker way to do it.

Question

Is there a shortcut way of displaying all the information of one tuple in Relational Algebra, or must all attributes be written out in the Project statement?
Yes.

In relational algebra the relation

Book

corresponds to

select * from Book


If you want to restrict to some rows you apply a selection &sigma;:

&sigma;ISBN=43221(Book)

In SQL this is a where-clause like

select * from Book where ISBN=43221


If you want to reduce the columns you need a projection &pi;:

&pi;ISBN, title, type(&sigma;ISBN=43221(Book))

In SQL this is a select-list different from *: 

select ISBN, title from Book where ISBN=43221