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Questions and Answers
What is the primary key in a relational database?
What is the primary key in a relational database?
- A column that can be duplicated
- A column that stores general categories
- A column that organizes data into two-dimensional tables
- A column designated to uniquely identify all table records (correct)
What does an entity represent in a database?
What does an entity represent in a database?
- A table for each entity
- A collection of related files
- A specific characteristic of each entity
- A generalized category representing person, place, or thing (correct)
How are data organized in relational databases?
How are data organized in relational databases?
- Into separate files for each entity
- Into one-dimensional tables with columns only
- Into two-dimensional tables with columns and rows (correct)
- Into hierarchical structures
What is the purpose of an entity-relationship diagram in a relational database?
What is the purpose of an entity-relationship diagram in a relational database?
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What does a one-to-many relationship in a relational database mean?
What does a one-to-many relationship in a relational database mean?
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