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 Business Objects  |  Question 36 of 80    Print  
what are derived tables.

  
Total Answers and Comments: 1 Last Update: December 28, 2007     Asked by: Ayodhya.g 
  
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December 27, 2007 09:03:36   #1  
chskumar Member Since: December 2007   Contribution: 7    

RE: what are derived tables.
Derived tables are tables that you define in the universe schema. You create
objects on them as you do with any other table. A derived table is defined by an
SQL query at the universe level that can be used as a logical table in Designer.
Derived tables have the following advantages:
• Reduced amout of data returned to the document for analysis.
You can include complex calculations and functions in a derived table. These
operations are performed before the result set is returned to a document,
which saves time and reduces the need for complex analysis of large
amounts of data at the report level.
• Reduced maintenance of database summary tables.
Derived tables can, in some cases, replace statistical tables that hold results
for complex calculations that are incorporated into the universe using
aggregate awareness. These aggregrate tables are costly to maintain and
refresh frequently. Derived tables can return the same data and provide real
time data analysis.
Derived tables are similar to database views, with the advantage that the SQL for
a derived table can include BusinessObjects prompts.

 
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How can I list the all the tables in the universe used by different objects. Also the tables which are not referred by objects.
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Latest Answer : do u want to link two tables or two universes, please speicfy the questionIf u want to link two tables means just through cardinality we can join, that means we need to check when the two tables have equal id. If u want to link two Universes we have ...
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Latest Answer : Derived tables are tables that you define in the universe schema. You createobjects on them as you do with any other table. A derived table is defined by anSQL query at the universe level that can be used as a logical table in Designer.Derived tables ...


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