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mysql - Meaning of "n:m" and "1:n" in database design

in Technique[技术] by (71.8m points)

In database design what do n:m and 1:n mean?

Does it have anything to do with keys or relationships?

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by (71.8m points)

m:n is used to denote a many-to-many relationship (m objects on the other side related to n on the other) while 1:n refers to a one-to-many relationship (1 object on the other side related to n on the other).


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