entity framework - About Multiplicity in Model first: Does Many mean '0..*' or '1..*'? -


i'm new database , entity framwork, when use model first build database, there 3 choices, here many means 0..* or 1..* ? if relationship 1 many, here many kind of 0..* , mean foreign key here nullable?

thanks.

0..* means 0 many there doesn't need entry in foreign table matches.

1..* means 1 many there must entry in foreign table.


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