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week11 (the relationships in the data model (Parent and Child tables: (The…
week11
the relationships in the data model
Primary key
Parent and Child tables:
The table that is referenced by the foreign key is called the parent table.
The table that contains the foreign key is called the child table.
Foreign key
EJB
persistenceUnit
DS
E.M.
DB
web(CDIBean)
ejb
SO Header(non-owning side)
List<line> lines
JAVA物件具有方向性(DB沒有)
Owner= from side, if 1:M or M:1 M is owner
Line (Owning side)
pool
1 to many