Question: Data representations Relational Hierarchical Network Sequential file, single record type, fixed format Sequential file, single record type, delimited format Sequential file, multiple record type, fixed

Data representations

Relational Hierarchical Network Sequential file, single record type, fixed format Sequential file, single record type, delimited format Sequential file, multiple record type, fixed format EDI-style file XML file

For each of the data representation diagrams you did in exercise 1, which representation is:

Most efficient for the amount of storage required?

Least efficient for the amount of storage required?

Most efficient for producing a report for each instructor of courses taught?

Least efficient for producing a report for each instructor of courses taught?

Most efficient for producing a report of the number of courses taught by each instructor?

Least efficient for producing a report of the number of courses taught by each instructor?

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