A wildlife conservation organisation stores data about endangered species in a database. The Species table has the following structure:

Species_ID | Species_Name | Population | Conservation_Status | Region_ID

Which field would be most appropriate as the primary key?

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Question

A wildlife conservation organisation stores data about endangered species in a database. The Species table has the following structure:

Species_ID | Species_Name | Population | Conservation_Status | Region_ID

Which field would be most appropriate as the primary key?

Accepted Answer

Species_ID — Award 1 mark for identifying that Species_ID is the most appropriate primary key as it uniquely identifies each record. A is incorrect — species names may not be unique or could change. C is incorrect — Conservation_Status would have many duplicate values. D is incorrect — Region_ID is likely a foreign key linking to a Regions table and would have duplicate values.

Answer

Region_ID

Answer

Species_Name

Answer

Conservation_Status

Answer

Species_ID

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