Howdy, guys
"select" methods are optional.
only "findByPrimaryKey" method is a must among select and find methods for Entyty EJB.
but please, read once again, spec p.193 says :
The entity bean class may define one or more select methods
"MAY DEFINE", is not equal "DEFINES"
I can say:
A man may get married one or more times in his life.
(He/she may never married at all. Sounds sad, but it could be...

)
But this NOT the same, that :
A man always get married one or more times in his life.
This is not true. Marriage is not a mandatory
Cheers!