Wednesday, October 21, 2015

Mathematics & Meaning

My October column @AllAnalytics.

We have seen that the usefulness of the relational data model (RDM) is in its dual theoretical foundation -- first order predicate logic (FOPL) and set theory -- the mathematics guarantees provable logical correctness of query results regardless what meaning is assigned to the database R-tables. But a logically correct result is not necessarily a meaningful result. As a reader commented "If a is Salary and b is Start date, the [Cartesian] product a*b still doesn't have a sensible meaning." It is critical for the analyst to understand the distinction.

Read it all. (Please comment there, not here)







Do you like this post? Please link back to this article by copying one of the codes below.

URL: HTML link code: BB (forum) link code:

No comments:

Post a Comment