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2. Oracle Designer I: Diagrams 21 Part 2: Diagrams in Oracle Designer References: Barker: CASE×Method, Entity Relationship Modelling. Addison Wesley, 1990, ISBN 0201416964, ca. $61. Colette×Dorsey:
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How to fill out oracle designer i erdiagrams
How to fill out Oracle Designer I ERDiagrams:
01
Start by identifying the entities involved in your database system. These can be objects, people, or concepts that are relevant to your database.
02
Determine the attributes for each entity. Attributes represent the characteristics or properties that describe the entities. For example, if you have an entity called "Customer," attributes may include customer name, address, and contact information.
03
Establish relationships between entities. Relationships specify how different entities are connected in the database. For example, a "Customer" entity may have a relationship with an "Order" entity, indicating that a customer can place multiple orders.
04
Define cardinality and participation constraints. Cardinality describes the number of instances of one entity that can be associated with the other entity in the relationship. Participation constraints indicate whether an entity is mandatory (must exist) or optional (may or may not exist) in the relationship.
05
Specify primary and foreign keys. A primary key uniquely identifies each instance of an entity, while foreign keys refer to the primary keys of other entities to establish relationships.
06
Add any additional constraints or business rules specific to your database system.
07
Finally, validate and refine your ERDiagram to ensure accuracy and completeness.
Who needs Oracle Designer I ERDiagrams:
01
Database administrators (DBAs) use ERDiagrams to design and plan the structure of a database system. It helps them understand the relationships and dependencies between different entities in the system.
02
Application developers use ERDiagrams as a blueprint for developing database applications. It provides them with a visual representation of the database schema and helps in writing efficient database queries.
03
Business analysts and stakeholders use ERDiagrams to understand the data model and how it aligns with the organization's overall business processes. It helps them identify areas for improvement and make informed decisions based on the structure of the database system.
04
IT project managers may also find ERDiagrams useful for project planning and resource allocation. It allows them to visualize the database structure and estimate the complexity and effort required for development and maintenance tasks.
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What is oracle designer i erdiagrams?
Oracle Designer is a software suite of interactive design tools that help developers design and architect a wide range of applications.
Who is required to file oracle designer i erdiagrams?
Database administrators or developers who are responsible for designing the database structure using Oracle Designer.
How to fill out oracle designer i erdiagrams?
To fill out Oracle Designer ER diagrams, users can use the graphical user interface provided by the tool to create entities, define relationships, and specify attributes.
What is the purpose of oracle designer i erdiagrams?
The purpose of Oracle Designer ER diagrams is to visually represent the structure of a database, including tables, columns, and relationships between entities.
What information must be reported on oracle designer i erdiagrams?
ER diagrams in Oracle Designer typically include entity names, attributes, primary and foreign keys, as well as relationships between entities.
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