MATHS
Prepare different types of family trees based
on your family relations
i) One - one relations
ii) One - many relation
Answers
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Answer:
ii). one - many relation
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1)A one to one relation when each row in one table has only one related row in a second table.
2)A one to many relation exists when one row in table A may be linked with many row in table B.
Explanation:
- One to many relations are not function.The field on the one side of the key relationship must have a unique index.one to many relationship is not a property of the data .Example;Draw the mapping diagram for the function of f(x)=3×3+4 in the set of real number.
- One to one relationship refers to relationship of two items in which one can only belong with the other.When you are creating a database one row directly corresponds to another row.
- One to one relationship is a link between the information of two tables.Examples:One to one relationship between owner and employees.
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