Data from different data sources is stored in a relational database for end use analysis
Data from different data sources is stored in a relational database for end use analysis Data is organized in summarized, aggregated, subject oriented, non volatile patterns.
Data is a data warehouse is consolidated, flexible collection of data Supports analysis of data but does not support online analysis of data.
The DSS is (Decision Support System) used for the decision making purposes not for day-2 day issues.by the top level/ sr/middle level managments people in a established company.
but the OLTP SYSTEMS handles the day-day transactions data entries billing etc issues .
The DSS WILL be handled by only a few users especially
top poeple in the corporate ladder hence The number of users who are making use of DSS are less.
but in OLTP(ONLINE TRANSACTION PROCESSING) the number of the users are high since no such kind of decision making is entailed.
A data warehouse is a database geared towards the business intelligence requirements of an organisation. The data warehouse integrates data from the various operational systems and is typically loaded from these systems at regular intervals. Data warehouses contain historical information that enables analysis of business performance over time
Okay there are two camps on this Bill Inmon which is Date and Coddbased database design that has grown into the ODS reporting DSS database and of course Ralph Kimball whose mythology comprises of a star schema and dimension modeling... I could go on and on but basically a data warehouse is a database that is specifically designed for reporting I leave Inmon to the oltp ODS and a true data wareshouse to Ralph Kimball. When I have to interview a data warehouse DBA et al the first question I ask who is Ralph Kimball and can you tellme about the data warehouse toolkit
