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Pros and cons of using Tableau with
OLAP and RDB
Balaji M
2 Confidential Services
Simplified Tableau Dashboard Creation
Users do not have the expertise to build database relationships or join
database tables from a back end database.
• OLAP
– Data relationships already exist
– Defined hierarchies and metrics exist
• RDB
– User needs to re-create data relationships
– All metrics and formulas need to be re-created
– User needs much more technical expertise
• Risk
If users are given the opportunity to create their own data relationships and metrics,
they could become confused, build the wrong data relationships, and ultimately lose
confidence in, and not use. the system.
3 Confidential Services
Fast Data Query Performance
When comparing the performance of OLAP vs. RDB, it is clear that OLAP outperforms a RDB when querying data.
OLAP
• Created specifically to aggregate data
• Hierarchical data structures well-defined
• Data retrieval performance exceeds that of a RDB
RDB
• Fact tables can contain millions of rows which is time-consuming for a RDB to aggregate
• User needs to understand table relationships to get proper performance gains
Risk
• Users do not understand the design of the RDB warehouse. If the users are given access to build their own relationships, then it is possible for the queries
to run poorly due to invalid associations. The DI development team has typically spent many weeks or months building a fast and robust OLAP design. The
performance of the OLAP cube will exceed querying directly against the database.
4 Confidential Services
Summary
If your reports has built an OLAP cube for reporting, Tableau should be
sourced from the OLAP cube rather than a relational database source due to
query performance, less user knowledge required, reusability of the OLAP
components across multiple interfaces, and the maintainability of hierarchies,
metrics and calculations.
5 Confidential Services
Few Limitations of Tableau
• Drill down analysis are limited
• Role based security access is not at different level
• Pixel perfect reporting
Videos:
• Analytics Anywhere: The Power of Tableau Mobile:
• https://www.youtube.com/watch?v=3pNvBK_VPs0
•
• Tableau and SalesForce Unlock the power:
• https://www.youtube.com/watch?v=9YoGCy2-7uY
Thank you.
Questions And Answer Session

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Tableau olap

  • 1. Pros and cons of using Tableau with OLAP and RDB Balaji M
  • 2. 2 Confidential Services Simplified Tableau Dashboard Creation Users do not have the expertise to build database relationships or join database tables from a back end database. • OLAP – Data relationships already exist – Defined hierarchies and metrics exist • RDB – User needs to re-create data relationships – All metrics and formulas need to be re-created – User needs much more technical expertise • Risk If users are given the opportunity to create their own data relationships and metrics, they could become confused, build the wrong data relationships, and ultimately lose confidence in, and not use. the system.
  • 3. 3 Confidential Services Fast Data Query Performance When comparing the performance of OLAP vs. RDB, it is clear that OLAP outperforms a RDB when querying data. OLAP • Created specifically to aggregate data • Hierarchical data structures well-defined • Data retrieval performance exceeds that of a RDB RDB • Fact tables can contain millions of rows which is time-consuming for a RDB to aggregate • User needs to understand table relationships to get proper performance gains Risk • Users do not understand the design of the RDB warehouse. If the users are given access to build their own relationships, then it is possible for the queries to run poorly due to invalid associations. The DI development team has typically spent many weeks or months building a fast and robust OLAP design. The performance of the OLAP cube will exceed querying directly against the database.
  • 4. 4 Confidential Services Summary If your reports has built an OLAP cube for reporting, Tableau should be sourced from the OLAP cube rather than a relational database source due to query performance, less user knowledge required, reusability of the OLAP components across multiple interfaces, and the maintainability of hierarchies, metrics and calculations.
  • 5. 5 Confidential Services Few Limitations of Tableau • Drill down analysis are limited • Role based security access is not at different level • Pixel perfect reporting Videos: • Analytics Anywhere: The Power of Tableau Mobile: • https://www.youtube.com/watch?v=3pNvBK_VPs0 • • Tableau and SalesForce Unlock the power: • https://www.youtube.com/watch?v=9YoGCy2-7uY
  • 6. Thank you. Questions And Answer Session