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What is the difference between a data warehouse and a data mart?
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Answer / abhinav
data warehouse
1. DW is a collection of information for all enterprise wide.
2. it usually contain the historical data.
3.information for analysis diff. department.but can manipulate/alter the data after authorization permission.
4.store the data for corporate view.
data mart
1. it is a part of the DW.
2. its gives the total information of the particular department.
3. it allow the user to update the data for transactional use.
4. it's mostly used by the department view.
| Is This Answer Correct ? | 2 Yes | 0 No |
Answer / nagesh dusi
datawarehouse is the collection of different subject related
information in the organization like
finance,hr,sales,purchases.datawarehouse is for analysis
purpose.we can read the data only,once the data is stored we
can not change(until the client athorization).Data warehouse
will store the historical data for analysis purpose and
Reporting purpose.To construct the data ware house it will
take 1 to 2 years.
In data mart subject related information is stored.data mart
is the part of the dataware house.it explain the information
about the particular subject. we can make changes with
insert,update and delete options.Most of the companies will
prefer Data Mart only for there organizations.Data Mart is
used to Record the current transactional record purpose. To
construct the Data Mart it will take 6 months to 8
months.organizations firstly prefer to construct there
typical area of the business first on this data mart and
based on the requirement of the organization they will
implement remaining data marts
| Is This Answer Correct ? | 2 Yes | 1 No |
Answer / mohit
In Data warehouse -- data received from staging area
In data mart -- star join (facts and dimension )
| Is This Answer Correct ? | 1 Yes | 0 No |
Answer / geeta yadav
Data warehouse is a collection of multiple subjects and many
data sources.
Data Mart is a single object and few data sources.
| Is This Answer Correct ? | 0 Yes | 0 No |
Answer / neha
The collection of the datamarts is non as dataware house.
The section or part of the dataware house is called data
marts.These data marts may be independent or dependent or
both.
| Is This Answer Correct ? | 13 Yes | 15 No |
If your client approaches you and says that he wants to create a Datawarehouse, and provides just the info regarding his source systems. What are all the neccessary actions one is supposed to take/understand and get back with a comprehensive document which convinces the client to proceed with the DW initiative. What are all the documents we need to provide the client?
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