cognos report/Data base users

[johny.cbi]

there are 10 users and licences for cognos  reports

is it compulsory to have 10 oracle (Data base) licences for those 10 cognos report users ?

what is the minimum licences required for database if we have more user licences for reports?

[almeids]

I believe it's 1, if you are configured so that your Cognos users are using a single database signon.