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Asked: 2026-05-23T19:37:03+00:00

When I look a Db schema or a diagram it is obvious to figure

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When I look a Db schema or a diagram it is obvious to figure out if there is a many-to-many relationship between two tables.

But how can I analyze this from the computer point of view? What kind of test algorithm the code should follow to decide there is a many-to-many relatiopnship between TableA and TableB?

I would appreciate if you can suggest a way without using any specific language based methods or helpers.

Something like:

“If ‘this’ is true, then there is absolutely a many-to-many
relationship between 2 tables.”

So what should I write at the place of ‘this’ ?

Thanks

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1 Answer

  1. Editorial Team

    There exists a table C not equal to A or B with foreign keys corresponding to primary keys in A and B.

    Just a guess. I think it’s true, though; it certainly happens when you want a m2m relationship… When it just happens to occur, I think you are OK reading a m2m relationship into it.

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