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In Data Warehouse Modeling, a star schema and a snowflake schema consists of Fact and Dimension tables.
Fact Table:
It contains all the primary keys of the dimension and associated facts or measures(is a property on which calculations can be made) like quantity sold, amount sold and average sales.
Dimension Tables:
Dimension tables provides descriptive information for all the measurements recorded in fact table.
Dimensions are relatively very small as comparison of fact table.
Commonly used dimensions are people, products, place and time.
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In a data warehouse, dimensions provide structured labeling information to otherwise unordered numeric measures. The dimension is a data set composed of individual, non-overlapping data elements . The primary functions of dimensions are threefold: to provide filtering, grouping and labelling. See more
Slowly changing dimensions
A slowly changing dimension is a set of data attributes that change slowly over a period of time rather than changing regularly e.g. … See moreIn data warehousing, a dimension table is one of the set of companion tables to a fact table.
The fact table … See moreWhen referencing data from a metadata registry such as ISO/IEC 11179, representation terms such as "Indicator" (a boolean true/false … See more
Date and time
Source:
Since many fact tables in a data warehouse are time series of observations, one or more date dimensions are often needed. One of the reasons to have date … See moreWikipedia text under CC-BY-SA license WebMay 8, 2023 · In Data Warehouse Modeling, a star schema and a snowflake schema consists of Fact and Dimension tables. Fact Table: It …
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WebAug 12, 2020. from <Data Warehouse Toolkit> Agenda. Fact table. Dimensional table. Facts and Dimensions Joined in a Star Schema. Fact Table. Fact table — stores the performance...
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