“Maintaining Data Integrity” & “Aggregate Queries”

Describe the importance of maintaining integrity rules throughout the database structure.  Create at least three examples of common relationships that are used within a relational database system.  Justify your response. 

Many times, database designs do not include the proper use of indexes. Provide a specific example on how an index could be used in order to enhance user search experience. List specific fields that you would index. Analyze what would occur if the proper index is not included, with respect to your example.

Suppose you have been hired as an IT professional to support database reporting functionality for a Human Resources system.  Compose at least two aggregate function queries that can be useful for the executives of the organization to extract summary data from a database system.  

Synthesize how aggregate functions help the organization understand employee performance. Provide an example that supports how the aggregate function is used to leverage talent within the organization. Note: The Strayer Oracle Server may be used to test and compile the SQL Queries developed.

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