Difference between ODS and Staging
Answers were Sorted based on User's Feedback
Answer / sunil
ODS means operational data store which supports operational
monitoring,data is
volatile,current,detailed,subjectoriented and integrated.
Staging is temperary storage location which is used for
processing the data.
staging area cleans operational data before loading the
data into Dw.
Is This Answer Correct ? | 17 Yes | 3 No |
Answer / harshad
An operational data store (ODS) is a type of database often
used as an interim area for a data warehouse. Unlike a data
warehouse, which contains static data, the contents of the
ODS are updated through the course of business operations.
An ODS is designed to quickly perform relatively simple
queries on small amounts of data (such as finding the
status of a customer order), rather than the complex
queries on large amounts of data typical of the data
warehouse. An ODS is similar to your short term memory in
that it stores only very recent information; in comparison,
the data warehouse is more like long term memory in that it
stores relatively permanent information.
But in staging we are storing current as well as historic
data. This data might be a raw and then need cleansing and
transform before load into datawarehouse.
Is This Answer Correct ? | 28 Yes | 15 No |
Answer / pravin
Operational Data store is a subject
oriented,integrated,current,volatile collection of data
used to support the tactical decision making process for
the enterprise. It is the central point of data integration
for busienss management,delivering a common view of
enterprise data.
In Staging Area you are carried out ETL operations as per
your business logic in order to fetch processed information
into data ware house.
Is This Answer Correct ? | 9 Yes | 12 No |
Answer / kalpana
1. ODS is close to the source. We can say it is a replica
of source system.
While the staging area is a replica of the target DW.
2. The dimention and fact will come into picture here in
staging.
3. We are doing the Transformations in staging schema
before loading it to the target.
4. We integrate different ODS source systems into the
staging area and not in the ODS.
Is This Answer Correct ? | 17 Yes | 21 No |
What are snapshots? What are materialized views & where do we use them?
what are confirmed dimension? We alwys give date as a conformed dimension but if it has different format for different contries say YYMMDD for italy and MM-DD-YYYY for france.Then are they not confirmed.
4 Answers IBM, MAHINDRA, Tech Mahindra,
What is metadata in context of a datawarehouse?
Explain how does tuple-oriented relational calculus differ from domain-oriented relational calculus?
What is a core dimension?
Is union transormation is active transformation?
Explain the data types present in bo n wht happens if we implement view in the designer n report?
How can you import tables from a database?
What is conformed fact?
What is the advantages data mining over traditional approaches?
Explain Association algorithm in Data mining?
What is a look up function? What is default transformation for the look up function?