Does an EJB have to have a primary key field as in if I am modelling a Table (that does not have a primary key) can I replicate this in an EJB...Reason for asking is that an Entity EJB create should return PK...or is this not the case...
how a primary key mantion when u create a table in database
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Your EJB primary key does not have to relate to the database primary key in any way, it's just that it usually does.
You should have a primary key somewhere though.
If the data you are modelling here is, for example, a time series with no real context and hence no primary key then it's probably not suitable for entity bean.