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Oracle

1Z0-591 · Question #28

An organization has its employees' names in an Employees table, and information about their jobs in a Jobs table. However, an organization's employees can have multiple jobs, and the same job can be…

The correct answer is B. By creating a bridge table that represents one employee doing one job, with several rows for an. When you need to model many-to-many relationships between dimension tables and fact tables, you can create a bridge table that resides between the fact and the dimension tables. A bridge table stores multiple records corresponding to that dimension. In the Administration Tool…

Developing the Business Model and Mapping Layer of a Repository

Question

An organization has its employees' names in an Employees table, and information about their jobs in a Jobs table. However, an organization's employees can have multiple jobs, and the same job can be performed by multiple employees. This situation would result in a many to-many relationship between the Employees and Jobs tables. How can the many to-many relationship issue be resolved?

Options

  • ABy modeling the many to many relationship in the business model
  • BBy creating a bridge table that represents one employee doing one job, with several rows for an
  • CBy creating the many to many join in the physical model
  • DBy creating a logical table source (LTS) that joins the Employees and Jobs tables

How the community answered

(49 responses)
  • A
    12% (6)
  • B
    78% (38)
  • C
    4% (2)
  • D
    6% (3)

Explanation

When you need to model many-to-many relationships between dimension tables and fact tables, you can create a bridge table that resides between the fact and the dimension tables. A bridge table stores multiple records corresponding to that dimension. In the Administration Tool, General tab in the Logical Table dialog box contains a check box that you can select to specify that a table is a bridge table. A bridge table allows you to resolve many-to-many data relationships.

Topics

#many-to-many relationship#bridge table#logical table source#data modeling

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