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The purpose of the database is to store information about sex offenders and their location so that parents can do these things to protect their kids

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Database Systems Concepts

The purpose of the database is to store information about sex offenders and their location so that parents can do these things to protect their kids.

  1. Know who is in their neighborhood
  2. Use Family Watchdog to locate sex offenders near their home and their kid's school.
  3. Empower their kids with information
  4. Change the laws
  5. Support the Child Safety Act of 2005

The database views include

  • maps with home and work locations identified
  • lists
  • recent address changes
  • free alerts
  • send maps to a friend screen
  • notify/add a missing school or public facility
  • count mappable and non-mappable (7%) offenders by
  • show parks, schools and other public places where caution should be
  • categorization of the criminals that are registered by

A badly designed ER diagram is attached as Exhibit A. In fact, it’s one table, unrelated to any others.

 

  1. Joe Amateur has designed the OFFENDER table of the National Sex Offenders Registry without much care or concern for programming, redundancy or data integrity. You’ve been hired to straighten out the mess by implementing properly related tables. You’ve been able to come up with the ER diagram in Exhibit A. Now show functional dependency diagrams and the steps required to construct the schema constructs for tables in 3rd normal form. Assume that the following additional FD occurs in addition to what you can read from the ER

{ZipCode}Ø {City, State}

  1. Show 1NF and tell what the rules are for first normal form. (10 pts)
  2. Show 2NF and tell what the rules are for second normal form. (10 pts)



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