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Questions and Answers
Find the incorrect statement about a 1:N relationship in a data model
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?
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?
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
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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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