June 2004
Intermediate to advanced
848 pages
21h 28m
English
Content preview from Just Java™ 2
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Relationships
Let's say more about the relationship between a foreign key and the table where it is a primary key. That relationship can be one-to-one, one-to-many, or many-to-many.
One-to-one relationships
A one-to-one relationship says that the two things are matched exactly.The relationship between ship and captain is one-to-one. Each ship has one captain, and each captain has one ship (ignoring real world details like mutinous ships, captains waiting for a command, etc.).
One-to-many relationships
As you might guess, a one-to-many relationship means that one thing in this table corresponds to potentially many things in that table. Each individual ship has multiple sailors, so the ship/crew member relationship is one-to-many. ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.