Identify all the components in the data hierarchy from the


1. Identify all the components in the data hierarchy from the bit to the database.

2. What is the difference between a data attribute and a data item?

3. What is the purpose of a primary key? What field or fields might be the primary key in an airline reservation system used to identify a specific seat on a specific flight for a specific airline on a specific day?

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Database Management System: Identify all the components in the data hierarchy from the
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