I understand why we need the first three normal forms. I can see what anomalies they prevent. But I'm unable to understand what anomalies are prevented by using Boyce Codd Normal Form. Can any kind redditor help me out?
I understand how it works and what I'm supposed to do to bring a relation into BCNF. But why do we need it? Can someone share an example of some anomaly which might occur if a relation is not in BCNF?
From what I understand, you can perform a 3NF decomposition, and if you can preserve dependency and still be lossless, you can then put it in BCNF.
However I am unsure how to take functional dependencies and come to these conclusions. Any help will be greatly appreciated.
The problem is as follows:
Relation{ABCD}
FDs:
BC > A
AD > C
CD > B
BD > C
convert to BCNF.
The only FD not in BCNF is BC > A. When I use the decomposition algorithm on it, I get two new relations, {ABC} and {BCD}. Now the FD I just considered is in BCNF. However, another FD, AD > C, now spans across both relations. Do I just throw it out and say the problem is done? Thanks
I'm confused as to how, if for example, we have a set of functional dependencies:
F = {AC -> B, B -> E, D -> F, F -> G}
How do I tell whether the functional dependencies violate each of these forms or not?
Could someone please explain to me how to get a relation into Boyce-Codd Normal Form?
To everyone who thinks I'm trolling or shit posting, I'm really truly not! I posted here thinking "it's Christmas Eve and maybe I'll get a couple replies". I tried googling it and couldn't find any info about it, but I figured Reddit would know. And oh, Reddit knows, and now I feel soooo naive.
it's a small company, under 100 employees, located on Vancouver Island, sort of tech related. I'm not high in the company... but could be hard to replace. It sounds like they should have taken out a seperate policy. I emailed the insurance broker guy, a I'll share what he says back! But it might be a few days.
Update: So just had it explained! it's set up this way so that they can set up a single 10 year policy, and have it be enough to be 2x the potential annual income of an employee by the end of 10 years. So, as the employee income increases, rather than having to redo the policy amount every 6 months, they just change the beneficiary split. But, as of this week, they're going to allow employees to set themselves as 100% beneficiary, and pay the additional premiums on coverage that exceeds 2x the annual income.
I hate, hate, hate from the bottom of my soul, filling out forms. Paperwork of any kind just SCARES me, because I make so many mistakes on it so easily- on one of my gcses, I needed three exam papers before I'd answered anything, because I kept filling out the front (name/student number/date for those in other school systems) wrong by accident. I have around a 50/50 chance of getting my address right, ditto on the date, and I ususally at least manage to spell my name properly but it's a roll of the dice whether I'll put it in the right box or not. It always makes me feel so stupid, and I'm pretty sure I've lost out on stuff through this- I've wrote my telephone number wrong on several job applications before. Digital forms are slightly better because I can't mess up the boxes, but that's the only advantage. Am I just dumb?
I've literally just started and chose the Fire starter. Every time I send him out, he evolves into his final form (the one with like 700 BST) immediately.
Note that I'm literally on Route 1.
Hey Everyone-
I was curious if anyone had an insights into this? The biggest thing to me that stood out regarding questioning how up to date this information is, is the Granbul example. In no way could Normal Granbul be ranked higher than its Shadow Form could it? Indeed, shadow Granbul is not anywhere even on the list… and it’s not like we are swimming in a large pool of massive Fairy Type Attackers…
Additionally, I’m confident that a few weeks ago I watched a breakdown of Hoopa that indicated next to MewTwo Hoopa was or should be the second best Psychic attacker we have (excluding shadows maybe?). Yet Hoopa is listed nowhere.
Are their other mons that are seemingly being left out? What’s the best way to contact Gamepress regarding updating this if it indeed needs to be?
Cheers!
I hear about denormalizing a relational database quite a bit but I'm curious, which of the first 3 Normal Forms is violated when I put what should be a calculated column in a master table. For example I have an orderHeader table with a bunch of order details and I put the order total as a column in the OrderHeader table. Which of the 3 NFs was violated?
