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key for an employee, such as a social security number, and a Sales system may assign its own business key to an employee. Using a surrogate key will tie the two together across applications, facilitating richer analysis.

(d) analog signal mixing (e) digital diversity encryption 58 A steady magnetic field can be produced by (a) a straight wire carrying a constant direct current (b) a loop of wire carrying a constant direct current (c) a coil of wire carrying a constant direct current (d) a constant-intensity stream of protons in free space, moving in a straight line (e) any of the above

details of the current song, which is represented by the this_song variable The new statement appears in boldface here:

Even if you are developing a dimensional model that currently supports a single department in the organization, be sure to keep the entire organization in mind to facilitate future enhancements. Shared, or conformed, dimensions facilitate analysis across departmental fact tables. For example, an Employee dimension might include employee salary, manager, and hire dates (Human Resource information) as well as sales region assignments (Sales information). Storing both sets of data enables the analysis of hiring programs and manager-mentoring effectiveness on sales performance.

tell the application id "comappleitunes" with timeout of 1200 seconds try set three_star_songs to every track of playlist "Library" whose rating is 60 repeat with this_song in three_star_songs set song_details to "Song:" & tab & name of this_song & return & "Artist:" & tab & artist of this_song & return & "Album:" & tab & album of this_song & return & "Played:" & tab & played count of this_song & return & "Added:" & tab & date added of this_song end repeat end try end timeout end tell

You could stop after creating the data warehouse. Some do. Analysis Services, or any OLAP technology, requires a new skill set to develop and maintain cubes. But a cube solution vastly improves the analytical and usability factor in the resulting solution.

Exam-3 Illustration for Final Exam Question 59 59 In Fig Exam-3, what type of component can the box with the query symbol ( ) contain in order for the circuit to function as indicated (a) A capacitor (b) A resistor (c) A battery (d) An inductor (e) A diode 60 The binary number 1001101 represents which decimal number (a) 44 (b) 55 (c) 66 (d) 77 (e) 88 61 Suppose a dc circuit has 10 k of resistance, and a 12-V battery is connected to it How much power is drawn from the battery (a) 12 W (b) 12 W

Users no longer have to know how to write T-SQL or be constrained by static reports. There are also a number of tools that consume OLAP data sources Excel (shown in figure 3), PerformancePoint, Reporting Services, and Panorama, just to name a few. And the query response speed can go from many minutes (or hours) for a SQL query to seconds from a cube. The power of online analysis is the ability to quickly ask a question, get an answer, and then ask another question based on the first result. Analysis Services cubes are specifically designed to retrieve thousands or millions of data points and aggregate them quickly. Some of this performance is accomplished through aggregations, which precalculate the data at predefined intersections of dimensions. Think of it as building several indexed views to provide summarized information in SQL Server. The difference in query time often differs in orders of magnitude. There is a common misconception regarding where cube data is stored. Cubes have their own separate data store in addition to the data warehouse. This can be greatly minimized using ROLAP (relational OLAP) partitions, but this is universally considered a bad idea except for small real-time partitions, due to performance. MOLAP (multidimensional OLAP) is the preferred storage option, which results in a redundant data store that is specifically tuned for OLAP query performance. Cube processing is the activity that loads data into the cube from the data source.

less than the duration of the song, as shown in boldface here: