Joined
Last Seen
0 Reputation Points
Unknown Quality Score
No one has voted on any posts yet. Votes from other community members are used to determine a member's reputation amongst their peers.
0 Endorsements
Ranked #72.8K
~649 People Reached
This member's community profile is only visible to logged in members until they have earned 15 reputation points.
Favorite Forums
Databases x 2
Favorite Tags
database-sql x 2
database-design x 2
2 Posted Topics
Yes, Division is of course an entirely different opperation than difference. It is most often used when you want to find tuples in on table that relate to all tuples in another table. For instance: We have three tables: Boyz with data on severel boys, like name adress et cetera, …
Re: candidate key
A candidate key is a uniqe key within a table. All unique keys are candidates to be the primary key (primary keys are like the highlander in tables: There can be only one. the other candidates most probably will need to have a unique index when you implement the database). …
The End.