Transcript Using the Database Documenter Tool

by Mary Anne Poatsy, Keith
Mulbery, Eric Cameron, Jason
Davidson, Rebecca Lawson, Linda
Lau, Jerri Williams
Chapter 9
Fine-Tuning the
Database
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Verify first normal form
Verify second normal form
Verify third normal form
Create relationships
Use the Database Documenter tool
Use the Performance Analyzer tool
Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall.
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Use the Table Analyzer tool
Use the Database Splitter tool
Create a menu system
Encrypt and password-protect a database
Digitally sign and publish a database
Save a database as an ACCDE file
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• Normalization – the process of deciding which
fields should be grouped together into which
tables
• Benefits:
– Minimization of data redundancy
– Improvement of referential integrity enforcement
– Ease of maintaining data
– Accommodation of future growth
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• Anomaly – an error or inconsistency within a
database
• Normal forms – rules of normalization
• Majority of database design only requires the
first three normal forms
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• First normal form (1NF) – a table that
contains no repeating groups or repeating
columns
• Problem with repeating groups:
– Difficult to add new entries
– Difficult to update existing entries
– Difficult to properly extract information
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• Second normal form (2NF) – meets 1NF
criteria, and all non-key fields are functionally
dependent on the entire primary key
• Functional dependency – when the value of
one field is determined by the value of another
• Non-key field – any field that is not part of the
primary key
• Composite key – primary key that is made of
two or more fields
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• Third normal form (3NF) – meets 2NF
criteria, and no transitive dependencies exist
• Transitive dependencies – when the value of
one non-key field is functionally dependent on
the value of another non-key field
– Allows corrections to be made in one place
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• Create relationships after the normalization
process
• Enforce referential integrity
• Relationships can test normalization
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• Database Documenter – creates a report that
contains detailed information for each selected
object
• Does not identify flaws in the design
• Only choose information you want to see
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• Database Documenter use:
– To verify and update the properties of one object
using a printout of the properties of a similar object
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• Performance Analyzer – evaluates a database
and makes recommendations for optimization
• Three kinds of analysis results:
– Recommendations
– Suggestions
– Ideas
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• Add an Index
– Index – reduces the time it takes to run queries and
reports
– Appears frequently in Analysis Notes box
– Simple change to field(s) that improves performance
– Added to fields that will be searched often
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• Table Analyzer – analyzes and normalizes
tables
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• Database Splitter tool – enables you to split a
database into two files:
– Back-end database contains the tables
– Front-end database contains queries, forms, and
reports
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• Work with the Front-End Database
– Tables from original database replaced with linked
tables with the same names
– Linked tables have an arrow icon
– Pointing to a linked table name shows path in a
ScreenTip
– Data in linked tables in the front-end database
appear in back-end database
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• Computer security – the protection of data from
unauthorized access, change, or destruction
• Two general security categories:
– Physical security – protecting assets you can touch
(computers, storage devices, backup tapes)
– Logical security – protects information on physical
devices (databases, software)
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• Database security – protects a database from
unintended use:
– Unauthorized viewing of data
– Unauthorized copying and selling of data
– Malicious attacks
– Destruction of data by employees
– Inadvertent employee mistakes
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• Navigation form – tabbed menu system that
ties the objects in the database together to make
it easy to use
• Six preset templates
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• Start a Navigation Form Automatically
– Click the FILE tab, click Options, click Current
Database, select the navigation form using the
Display Form option
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• Encryption – process of altering digital
information using an algorithm to make it
unreadable to anyone except those that possess
the key (password)
• Database must be opened in exclusive mode to
add a password
• Exclusive mode guarantees that you are the only
person currently using the database
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• Digital signatures – electronic, encryptionbased, secure stamps of authentication that
confirm:
– Who created the file
– That the file is valid
– That no changes have been made to the file after
authentication
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• Certification authority (CA) – commercial
company, such as VeriSign, that issues identities
using digital signatures for a fee
• Users can purchase a signature from a CA or
create their own
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• SelfCert Tool
– Included with Microsoft Office
– Allows users to create a security certificate
• Digital Signature
– Can digitally sign and publish an Access 2013
database
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• Access Database Executable (ACCDE) file
will:
– Remove all VBA source code
– Prohibit users from making design and name
changes to forms and reports
– Prohibit users from creating new forms and reports
• Use Save As to save a database file in ACCDE
format
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• Keep the Original Database File Safe
– Once converted to .accde, a database cannot be
converted back to original format (.accdb)
– Changes must be made in original database
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• In this chapter you learned to:
– Verify first normal form
– Verify second normal form
– Verify third normal form
– Create relationships
– Use the Database Documenter tool
– Use the Performance Analyzer tool
Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall.
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– Use the Table Analyzer tool
– Use the Database Splitter tool
– Create a menu system
– Encrypt and password-protect a database
– Digitally sign and publish a database
– Save a database as an ACCDE file
Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall.
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Copyright © 2014 Pearson Education, Inc. Publishing as Prentice Hall.
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recording, or otherwise, without the prior written permission of the publisher. Printed in the
United States of America.
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