Wednesday 15 May 2013

Java SQL database class representation -



Java SQL database class representation -

tables:

car

long :: car_id string :: type

owner

long :: owner_id string :: name int :: age

car_owner

long :: car_id long :: owner_id date :: bought_date question:

so understand best way transfer info between java , sql db using java persistence api. each table represented java class @entity annotation.

but how mid-table "car_owner" represented java class?

the main thought relationship between both classes. check wiki-link more info onetoone relationship ( if business here auto has 1 owner ). if business owner has many cars , check manytoone link.

good luck assignment :)

java sql many-to-many persistence

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