Which of the following features are needed by data models to merge tables or create relationships? A. Similar structures
B. Unique identifier keys
C. Queries from the same file
D. Appended data tables
Which of the following features are needed by data models to merge tables or create relationships?
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The correct answer is B. Unique identifier keys.
Unique identifier keys (often referred to as primary keys) are essential for merging tables or creating relationships between them. These keys ensure that each record can be uniquely recognized and linked across different tables. While similar structures and queries from the same file can facilitate data manipulation, unique keys are foundational in establishing reliable relationships between datasets. Appended data tables involve stacking datasets vertically rather than relating them horizontally, which is not directly relevant to merging tables.
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