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Data Design

It is also known as data architecting.

It is a software engineering task that creates a model of thedata in more implementation specific representation.

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Ang Bulilit Liga Logical

Database Design

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Persistency

It means to make an element exists even after the applicationthat created it terminates.

It has the following characteristics that need to be identified:

Granularity Volume

Duration

Access Mechanism

Reliability

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Java Database Connectivity

(JDBC) Design Pattern It is a design pattern used to connect to a relational database

server that makes use of SQL Statements.

It is a design pattern that shows a mechanism to access data

in a relational database system. It has a static view and dynamic view.

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Static View

It is represented as a class diagram.

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Dynamic View

It represents the behavior of the classes defined in the staticview.

It is represented using the Sequence Diagrams.

JDBC Initialization JDBC Create

JDBC Read

JDBC Update

JDBC Delete

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JDBC Initialization

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JDBC Create

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JDBC Read

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JDBC Update

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JDBC Delete

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Developing the Data Design

Model1. Define the static view of the data element.2. Model the behavior of the classes using the dynamic view.

3. Document the data design classes.

4. Modify the software architecture to reflect the dbclasses andpersistent classes.

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STEP 1: Define the static view

of the data elements. Every data that needs to be persistent would have acorresponding DBClass.

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STEP 2: Model the behaviorof the class using the

dynamic view. In the example diagram, the JDBC Read for accessing an

athlete record is shown.

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DBAthlete JDBC Read

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DBAthlete JDBC Create

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DBAthlete JDBC Update

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DBAthlete JDBC Delete

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STEP 3: Document the data

design classes. Attributes and operations need to distributed to the classes.

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STEP 4: Modify the software

architecture.

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Summary

Data Design Concepts Java Database Connectivity (JDBC) Design Pattern of

Persistency

Static View

Dynamic View

JDBC Initialization

JDBC Create

JDBC Read

JDBC Update

JDBC Delete Developing the Data Design Model