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See all Premium member Presentation Transcript Data warehouse : Data warehouse By: RAVI RANJAN By: Ravi Ranjan Definition : Definition Data Warehouse A collection of corporate information, derived directly from operational systems and some external data sources. Its specific purpose is to support business decisions, not business operations. The Purpose of Data Warehousing : The Purpose of Data Warehousing Realize the value of data Data / information is an asset Methods to realize the value, (Reporting, Analysis, etc.) Make better decisions Turn data into information Create competitive advantage Methods to support the decision making process, (EIS, DSS, etc.) Slide 4: Data Warehouse Components Staging Area A preparatory repository where transaction data can be transformed for use in the data warehouse Data Mart Traditional dimensionally modeled set of dimension and fact tables Per Kimball, a data warehouse is the union of a set of data marts Operational Data Store (ODS) Modeled to support near real-time reporting needs. Data Warehouse Functionality : Data Warehouse Functionality Evolution architecture of data warehouse : Evolution architecture of data warehouse GO TO DIAGRAM GO TO DIAGRAM GO TO DIAGRAM GO TO DIAGRAM Very Large Data Bases : Very Large Data Bases Terabytes -- 10^12 bytes: Petabytes -- 10^15 bytes: Exabytes -- 10^18 bytes: Zettabytes -- 10^21 bytes: Zottabytes -- 10^24 bytes: Wal-Mart -- 24 Terabytes Geographic Information Systems National Medical Records Weather images Intelligence Agency Videos Warehouses are Very Large Databases Complexities of Creating a Data Warehouse : Complexities of Creating a Data Warehouse Incomplete errors Missing Fields Records or Fields That, by Design, are not Being Recorded Incorrect errors Wrong Calculations, Aggregations Duplicate Records Wrong Information Entered into Source System SUCCESS & FUTURE OF DATA WAREHOUSE : SUCCESS & FUTURE OF DATA WAREHOUSE The Data Warehouse has successfully supported the increased needs of the State over the past eight years. The need for growth continues however, as the desire for more integrated data increases. The Data Warehouse has software and tools in place to provide the functionality needed to support new enterprise Data Warehouse projects. The future capabilities of the Data Warehouse can be expanded to include other programs and agencies. Data Warehouse Pitfalls : Data Warehouse Pitfalls You are going to spend much time extracting, cleaning, and loading data You are going to find problems with systems feeding the data warehouse You will find the need to store/validate data not being captured/validated by any existing system Large scale data warehousing can become an exercise in data homogenizing Data Warehouse Pitfalls… : Data Warehouse Pitfalls… The time it takes to load the warehouse will expand to the amount of the time in the available window... and then some You are building a HIGH maintenance system You will fail if you concentrate on resource optimization to the neglect of project, data, and customer management issues and an understanding of what adds value to the customer Best Practices : Best Practices Complete requirements and design Prototyping is key to business understanding Utilizing proper aggregations and detailed data Training is an on-going process Build data integrity checks into your system. Slide 13: Thank You Slide 14: BACK TO ARCHITECTURE Slide 15: BACK TO ARCHITECTURE Slide 16: BACK TO ARCHITECTURE Slide 17: BACK TO ARCHITECTURE You do not have the permission to view this presentation. In order to view it, please contact the author of the presentation.
Data Warehouse ravionly431 Download Post to : URL : Related Presentations : Share Add to Flag Embed Email Send to Blogs and Networks Add to Channel Uploaded from authorPOINT lite Insert YouTube videos in PowerPont slides with aS Desktop Copy embed code: Embed: Flash iPad Dynamic Copy Does not support media & animations Automatically changes to Flash or non-Flash embed WordPress Embed Customize Embed URL: Copy Thumbnail: Copy The presentation is successfully added In Your Favorites. Views: 33647 Category: Education License: All Rights Reserved Like it (15) Dislike it (1) Added: January 26, 2009 This Presentation is Public Favorites: 10 Presentation Description No description available. Comments Posting comment... By: mariarose1253 (8 month(s) ago) siz can u plzz send me this ppt to marIa.rose16@gmai.com Saving..... Post Reply Close Saving..... Edit Comment Close By: ravionly431 (20 month(s) ago) Hi Arunajenefa & Raman, I have tried to send you the ppt but it is baouncing back. So please check ur mail once again and give me working mail id. Saving..... Post Reply Close By: chakralakshmi (19 month(s) ago) please send me this dataware house ppt to my mail i.e amajalachakralakshmi@gmail.com Saving..... Edit Comment Close By: raman2002 (20 month(s) ago) pls send me this ppt.... njot04@gmail.com Saving..... Post Reply Close Saving..... Edit Comment Close By: arunajenefa (20 month(s) ago) plz send ths presnt to arunajenefa@gmail.com Saving..... Post Reply Close Saving..... Edit Comment Close By: sushiltry (32 month(s) ago) can u pls send me sushiltry@yahoo.co.in thanks in advance Saving..... Post Reply Close Saving..... Edit Comment Close loading.... See all Premium member Presentation Transcript Data warehouse : Data warehouse By: RAVI RANJAN By: Ravi Ranjan Definition : Definition Data Warehouse A collection of corporate information, derived directly from operational systems and some external data sources. Its specific purpose is to support business decisions, not business operations. The Purpose of Data Warehousing : The Purpose of Data Warehousing Realize the value of data Data / information is an asset Methods to realize the value, (Reporting, Analysis, etc.) Make better decisions Turn data into information Create competitive advantage Methods to support the decision making process, (EIS, DSS, etc.) Slide 4: Data Warehouse Components Staging Area A preparatory repository where transaction data can be transformed for use in the data warehouse Data Mart Traditional dimensionally modeled set of dimension and fact tables Per Kimball, a data warehouse is the union of a set of data marts Operational Data Store (ODS) Modeled to support near real-time reporting needs. Data Warehouse Functionality : Data Warehouse Functionality Evolution architecture of data warehouse : Evolution architecture of data warehouse GO TO DIAGRAM GO TO DIAGRAM GO TO DIAGRAM GO TO DIAGRAM Very Large Data Bases : Very Large Data Bases Terabytes -- 10^12 bytes: Petabytes -- 10^15 bytes: Exabytes -- 10^18 bytes: Zettabytes -- 10^21 bytes: Zottabytes -- 10^24 bytes: Wal-Mart -- 24 Terabytes Geographic Information Systems National Medical Records Weather images Intelligence Agency Videos Warehouses are Very Large Databases Complexities of Creating a Data Warehouse : Complexities of Creating a Data Warehouse Incomplete errors Missing Fields Records or Fields That, by Design, are not Being Recorded Incorrect errors Wrong Calculations, Aggregations Duplicate Records Wrong Information Entered into Source System SUCCESS & FUTURE OF DATA WAREHOUSE : SUCCESS & FUTURE OF DATA WAREHOUSE The Data Warehouse has successfully supported the increased needs of the State over the past eight years. The need for growth continues however, as the desire for more integrated data increases. The Data Warehouse has software and tools in place to provide the functionality needed to support new enterprise Data Warehouse projects. The future capabilities of the Data Warehouse can be expanded to include other programs and agencies. Data Warehouse Pitfalls : Data Warehouse Pitfalls You are going to spend much time extracting, cleaning, and loading data You are going to find problems with systems feeding the data warehouse You will find the need to store/validate data not being captured/validated by any existing system Large scale data warehousing can become an exercise in data homogenizing Data Warehouse Pitfalls… : Data Warehouse Pitfalls… The time it takes to load the warehouse will expand to the amount of the time in the available window... and then some You are building a HIGH maintenance system You will fail if you concentrate on resource optimization to the neglect of project, data, and customer management issues and an understanding of what adds value to the customer Best Practices : Best Practices Complete requirements and design Prototyping is key to business understanding Utilizing proper aggregations and detailed data Training is an on-going process Build data integrity checks into your system. Slide 13: Thank You Slide 14: BACK TO ARCHITECTURE Slide 15: BACK TO ARCHITECTURE Slide 16: BACK TO ARCHITECTURE Slide 17: BACK TO ARCHITECTURE