Difference between a data attribute and a data item

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Reference no: EM131253961

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?

Reference no: EM131253961

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