Hi all, excuse me for this trivial question, but here's my doubt: create table person(varchar id, varchar surname, varchar name) with id primary key. Now, the query: select * from person order by surname,name provide me an explaination that is sequential scan + sort, as I expected. After that I build an index on surname,name (clustered) and run vacuum to update statistics. Then I ran again the query and got the same results (scan + sort) with the same time. Now my trivial question is: why another sort? The index is clustered so the database should not need to sort the output, or am I using wrong the tools? Someone can explain me that? Thanks, Luca
