Free Oracle 1z0-591 Practice Exam with Questions & Answers | Set: 2

A data warehouse is a database used for reporting and data analysis. It is a central repository of data which is created by integrating data from multiple disparate sources. Data warehouses store current as well as historical data and are commonly used for creating trending reports for senior management reporting such as annual and quarterly comparisons.

After creating your base metrics, try using the Calculation Wizard to automate the process of creating time-series metrics or comparison metrics such as: Change, Percent Change, Index, and Percent. The Wizard may save you many hours of time and frustration, especially if you have to create more than a handful of these metrics. In addition, the Wizard allows you to include customized logic to handle nulls in the base metrics. You may refer to the Oracle documentation for further detail.

Steps for Creating Aggregate Tables in OBIEE

1. Create all Dimension Tables, Fact Tables & Hierarchies, which are required to be aggregated.

2. Go to ToolsàUtilities (from Administration tool menu bar), a dialog box will pop up with all available utilities.

3. Select Aggregate Persistence Wizard, and then click Execute Button.

4. Now Select appropriate path where you need to generate Aggregate Table SQL.

Note : Click Generate DDL file for first time generation of Aggregate Table

Click Next, to move to next page (Select Business Model & Measure Page)

In Select Business Model & Measure Page, Select Appropriate Business Model & then select associated Fact / Measure.

Etc.

Example (see step 4 and 5 below): Getting Top-N Sales Reps for Year and Year-1

1. Under the “Business Model and Mapping” Layer, right click the “F1 Revenue” and select “New Object” -> “Logical Column…”

2. In the “Logical Column” Window give for Name: Year Ago Revenue as seen below:

3. Goto the “Column Source” Tab and select “Derived from existing columns using an expression” radio button then click on the “Edit Expression” icon.

4. Enter the following expression in the “Expression Builder” Window by selecting “Functions” in the “Category:” list, “Time Series Functions” in the “Functions:” list then “Ago” “Time Series Functions:” section.

5. Select the “<>” in the “Ago( )” function, then select “Logical Tables” in the “Category:” list, “F1 Revenue” in the “Logical Tables:” list, then double click the “Revenue” in the “Columns:” list.

Etc.

Denormalization is the process of intentionally backing away from normalization to improve performance by suppressing join and permitting the use of star transformation technique.

Denormalization should not be the first choice for improving performance and should only be used for fine tuning of a database for a particular application.

B: Before you can run Oracle Business Intelligence 11g Installer, you must first create

required Oracle Business Intelligence schemas in an unhardened database. You use

a tool called the Repository Creation Utility (RCU) to create these schemas with

the appropriate permissions and data.

E: The database 11gR2 is required if you want to run the Oracle Business Intelligence Enterprise Edition Plus Samples

One Oracle Database Preinstalled and not hardened to host the schemas.

Decrease query response time which will improve performance for Dashboards and Analysis.

BSO is preferred to ASO in the following scenarios:

* Top-down planning and allocation (Sales Forecasting)

* Cost Allocations across products and customers (Profitability Analysis)

* Currency conversion, inter-company eliminations(Financial consolidations)