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Uhh, in the context of an RDBMS a "relation" doesn't mean a "relationship" in the sense of a foreign key, it means a relational algebra relation, saying most ap
by kingkilr 16y ago
Uhh, in the context of an RDBMS a "relation" doesn't mean a "relationship" in the sense of a foreign key, it means a relational algebra relation, saying most applications will never need relations is like saying most applications don't use data.
- chopsueyar 16y agoOh Codd!
- psadauskas 16y agoMost applications won't need the features of an RDBMS that MongoDB & friends don't provide, so whatever definition of "relation" I used, its irrelevant. MongoDB provides enough "relational" algebra for 99% of web apps, without the additional "relational" constraints that a RDBMS forces on you.
- artsrc 16y agoTechnically a relation has to have a primary key so all that set theory is valid. A system could be based on bags, like SQL allows, can also have data.