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Data Modeling and 1

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Questions and Answers

Find the incorrect statement about a 1:N relationship in a data model

It implies the presence of more than one case table (correct)

It means that Table 1 can have multiple records for each record in Table 2

It represents that there are n elements in table 2 for every one element in table 1

The tables are associated with each other by mapping keys

What does a 1:N relationship represent in a data model?

There is one element in table 2 for every n elements in table 1

There are n elements in table 1 for every one element in table 2

There are n elements in table 2 for every one element in table 1 (correct)

There is one element in table 1 for every n elements in table 2

How are tables associated in a 1:N relationship in a data model?

By cross-referencing indexes

By mapping keys (correct)

By duplicating records

By overlapping data

Study Notes

1:N Relationships in Data Models

Represent a relationship between one parent entity and multiple child entities
One parent record in one table can be associated with multiple records in another table
Used to model relationships where one entity has multiple instances of another entity
Tables are associated through a foreign key in the child table that references the primary key in the parent table

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Description

Test your knowledge on data modeling with this quiz! Find the incorrect statement about 1:N relationships and learn more about the implications of connecting tables in a data model.