What's the difference between 'collision' and 'conflict'? In SQL language, should I say 'PK collision' or 'PK conflict'?
Learn English – What’s the difference between ‘collision’ and ‘conflict’
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A rock is bigger, possibly immovable, you couldn't throw it with one hand, at a pinch you might be able to with two.
Above, a Google Image result for "Rock", below, for "Stone"
Note that a boulder is probably bigger than a rock1.
Below, a boulder
Oh, also note that rocks and boulders are made from stone.
(This answer is mildly tongue in cheek)
1 Notable exception: Uluru/Ayre's Rock.
Cutlery has two definitions: 1. cutting/edged implements used for serving or eating food; 2. eating utensils in general. Without further context, an American is likely to assume the first definition (knives), while a Brit is more likely to go for the generic meaning. Silverware also means eating utensils, especially silver-colored ones, though nowadays, most silverware is not actually made of silver. An American synonym that does not imply anything about the silver content (or lack thereof) is flatware.
Crockery is completely different: in British English usage, it means the things on the dinner table that are usually made of china or porcelain -- plates, bowls, saucers, cups, serving bowls, etc. In American English, crockery is used for certain earthenware cooking pots, but given enough context, an American would probably understand crockery used according to the British definition.
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Best Answer
A collision is usually taken to mean a physical impact: two cars which crash into each other would be a collision.
A conflict is normally between two or more things which disagree in some way, although its meaning can be extended across both tangible and intangible notions. For instance, you can have a conflict of opinions, where someone disagrees with the other, but you can also have a physical conflict (a fight, or a war).
Conflict, used in its physical sense, could be synonymous with collision.
In your case, you should say a Primary Key (PK) Conflict, as — and I'm assuming it's a duplicate here — the primary keys disagree with each other because they are the same.
They don't physically bump into each other.