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What's the difference between one to many and many to many?


Asked by Cohen Nixon on Dec 07, 2021 FAQ



In that section we learned about 1-to-many relationships. There are also many-to-many and one-to-one relationships; as you can see these three types of relationships are named after the cardinality constraints. There is a fourth type, the many-to-one relationship, however, that is just the reverse direction of the one-to-many relationship.
One may also ask,
There is no difference in meaning. They are two variations of the same thing. The difference, if any, is mainly in tone. "So much" comes across as having greater sincerity or being more heartfelt than "very much.". "Very much" is polite but restrained and slightly impersonal.
And, 'Much' is mainly used as an adjective, while 'very' is specifically used as an adverb. 'Much' and 'very' are two terms that are used often used to imply more or excess. However, the two terms differ in the manner that they are used.
In respect to this,
Few is an antonym of many. As determiners the difference between many and few is that many is an indefinite large number of while few is (preceded by another determiner) an indefinite, but usually small, number of. As pronouns the difference between many and few
In fact,
Amount and number both refer to quantity, but each word has its own specific use. Number is used with nouns that can be individually counted, like stars. Amount is used for nouns that cannot be individually counted, like starlight.