3 ms·
> The relational model is not well suited to uncertain data, as a row in a table is generally interpreted as a true proposition True, but the proposition does
by goto11 8y ago
> The relational model is not well suited to uncertain data, as a row in a table is generally interpreted as a true proposition
True, but the proposition does not necessarily indicate a certain fact about the world. It might be e.g. measurement or observation or opinion or guess or whatever. The proposition is just that the measurement, guess or opinion is this.
- talaketu 8y agoThe power of the relational model is that we can use operators to combine relations to form new relations, which are then understood to also encode true propositions. A relational join is a logical implication. This is how SQL is able to answer complex queries with certainty from elementary certain data. Bayesian networks are able to do similar things from uncertain data.