Tài liệu Activity 9.4: Identifying Data Access Requirements ppt

Activity 9.4: Identifying Data Access
Requirements
In this activity, you will first identify the optimal data access method to use in a
given situation. Next, you will analyze the data access method selection in a
scenario.
Objectives
After completing this activity, you will be able to:
!
Identify the appropriate data access method for a given set of requirements
and constraints.

Before You Begin
This activity includes both small group tasks and class discussion.
Prerequisites
There are no prerequisites for this activity.
Materials
There are no materials for this activity.
Time to complete this activity: 15 minutes followed by a 10 minute
discussion.
74 Activity 9.4: Identifying Data Access Requirements



Exercise 1: Identifying a Data Access Method for a Scenario (10
minutes)
!
Identify data access requirements
1. Participate in small groups as assigned by the instructor.
2. Read each scenario below.
3. Identify which data access method best meets the needs of the scenario.

4. Write your answers below.


After completing the above steps, you will discuss your responses with the
class. The instructor will write the class consensus on a flip chart.
Scenarios

A All data for a new order entry system is going to be stored in
Microsoft
®
SQL Server
™
and accessed by Microsoft Excel for
querying and by the Web system for additional lookups. All data is
entered through the Web. New orders are also sent by sending e-mail
to the appropriate sales representatives.
B A custom application that requires e-mail to be generated and copies
to be stored in a repository for easy access in the future.


Solution


A

B






Activity 9.4: Identifying Data Access Requirements 75



Exercise 2: Analyzing Technology Selection (5 minutes)
!
Analyze technology selection
1. Participate in small groups as assigned by the instructor.
2. Validate the feasibility of the solution given in the scenario.
3. Make any comments in the space below.

After completing the above steps, you will discuss your responses with the
class. The instructor will write the class consensus on a flip chart.
Scenario
The company has decided to use existing order code from an old Microsoft
Visual Basic
®
application. All the data access code is DAO based. The new
database will be housed in Microsoft SQL Server 7.0.
Analysis
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