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Give E-R diagram for a database showing fatherhood, motherhood and spouse, relationship among men and women

Posted on 2009-12-28
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can some one ls tell me  the E-R diagram for a database showing fatherhood, motherhood and spouse, relationship among men and women
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Question by:dphfl
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Reza Rad earned 1500 total points
ID: 26130456
first entity you need is person
person has a field named gender that specify male or female
Person entity has one to many relation to itself on two fields: mother - father
because every person has only one mother and one father not more. but every mother or father can have many children.
you need another entity named PersonMarriage
person has one to many relation to personmarriage , bacause every person may have more than one marriage experience, for example divorced person and ....


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by:dphfl
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it did not clear fully,
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