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E1 and E2 are strong entities with 1:m relationship via R.

we take 1 separate table for each strong entity => so 2 tables
But if there is 1 : n relationship, then we take 1 side entity into many side  => so it should be 1 table, not 2 as 1:n is given

please explain which one is correct? 

1 Answer

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2 Tables are needed. For 2 strong entities, we make 2 tables, and then for reducing we shift R towards the many side of 1: m relationship i.e. we don’t require to build a separate table for relationship R.

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