Define repository in terms of
Siebel Analytics?
o Repository stores the Meta data information. Siebel repository is a file
system ,extension of the repository file. rpd.
o META DATA REPOSITORY
o With Siebel Analytics Server, all the rules needed for security, data
modeling, aggregate navigation, caching, and connectivity is stored in metadata
repositories.
o Each metadata repository can store multiple business models. Siebel Analytics
Server can access multiple repositories
What is the end to end life cycle of Siebel Analytics?
o Siebel Analytics life cycle
1. Gather Business Requirements
2. Identify source systems
3. Design ETL to load to a DW if source data doesn’t exist.
4. Build a repository
5. Build
dashboard
or use answers for reporting.
6. Define security (LDAP or External table…)
7. Based on performance, decide on aggregations and/or caching mechanism.
8. Testing and QA.
What were you schemas? How does Siebel Architecture works? Explain
the three layers. How do you import sources?
o There are five parts of Siebel Architecture.
1. Clients
2. Siebel analytics Web Server
3. Siebel analytics server
4. Siebel analytics scheduler
5. data sorces
o Metadata that represents the analytical Model Is created using the siebel
Analytics Administration tool.
o Repository divided into three layer
1. Physical – Represents the data Sources
2. Business – models the Data sources into Facts And Dimension
3. Presentation – Specifies the users view of the model;rendered in Siebel
answer
If you have 3 facts and 4 dimension and you need to join would you
recommend joining fact with fact? If no than what is the option? Why you won’t
join fact to fact?
In the BMM layer, create one logical
table (fact) and add the 3 fact table as logical table source
What is connection pool and
how many connection pools did you have in your last project?
connection pool is needed for every physical database.
It contains information about the connection to the database, not the
database itself.
Can use either shared user accounts or can use pass-through accounts -Use:
USER and PASSWORD for pass through .
We can have multiple connection pools for each group to avoid waitin
Purpose of Alias Tables?
An Alias table (Alias) is a physical table with the type of Alias. It is
a reference to a logical table source, and inherits all its column definitions
and some properties from the logical table source. A logical table source shows
how the logical objects are mapped to the physical layer and can be mapped to
physical tables, stored procedures, and select statements. An alias table can
be a reference to any of these logical table source types.
Alias Tables can be an important part of designing a physical layer. The
following is a list of the main reasons to create an alias table:
To reuse an existing table more than once in your physical layer (without
having to import it several times)
To set up multiple alias tables, each with different keys, names, or joins
To help you design sophisticated star or snowflake structures in the business
model layer. Alias tables are critical in the process of converting ER Schemas
to Dimensional Schemas.
How do you define the relationship between facts and dimensions in
BMM layer?
Using complex join ,we can define
relationship between facts and dimentions in BMM layer.
What is time series wizard?
When and how do you use it?
We can do comparison for certain measures ( revenue.,sales etc.. ) for
current year vs previous year, we can do for month or week and day also
Identify the time periods need to be
compared and then period table keys to the previous time period.
The period table needs to contain a
column that will contain “Year Ago” information.
The fact tables needs to have year ago
totals.
To use the “Time series wizard”. After
creating your business model right click the business model and click on “Time
Series Wizard”.
The Time Series Wizard prompts you to create names for the comparison measures
that it adds to the business model.
The Time Series Wizard prompts you to
select the period table used for the comparison measures
Select the column in the period table
that provides the key to the comparison period. This column would be the column
containing “Year Ago” information in the period table.
Select the measures you want to compare and then Select the calculations you
want to generate. For ex: Measure: Total Dollars and calculations are Change
and Percent change.
Once the Time series wizard is run the output will be:-
a) Aliases for the fact tables (in the physical layer)
b) Joins between period table and alias fact tables
c) Comparison measures
d) Logical table sources
o In the General tab of the Logical table source etc you can find “Generated by
Time Series Wizard” in the description section
o Then you can add these comparision measures to the presentation layer for
your reports.
o Ex: Total sales of current qtr vs previous qtr vs same qtr year ago
Did you create any new
logical column in BMM layer, how?
o Yes. We can create new logical column in BMM layer.
o Example: Right click on fact table -new lgical column-give name for new
logical column like Total cost.
o Now in fact table source,we have one option column mapping, in that we can do
all calculation for that new column.
Can you use physical join in BMM layer?
yes we can use physical join in BMM
layer.when there is SCD type 2 we need complex join in BMM layer.
Can you use outer join in BMM layer?
yes we can.When we are doing complex
join in BMM layer ,there is one option type,outer join is there.
What are other ways of
improving summary query reports other than Aggregate Navigation and Cache
Management
Indexes
Join algorithm
Mat/view query rewrite
Web proper report design its optimal by making sure that it is not getting any
addition column or rows
