Snowflake schema is refinement of star schema where some dimensional hierarchy is further splitting (normalized) into a set of smaller dimension tables
(Fig 7), forming a shape similar to snowflake.
of subjects, dimension table
of suppliers (including supplier code, supplier name, location, contact person, telephone, competent department, sales personnel, etc.
Given a particular dimension table
Di, the members of the dimension are the values in this table and they are arranged in a hierarchy denoted <i.
After a careful examination of the data required for preparing unit price, the DANUP is designed with 13 tables: six fact tables and seven dimension tables
Therefore, it's useful to create a dimension table
that contains ranged values of critical recency, frequency and sales measures.
Key words: fact table, dimension table
, star schema, star join, SQL query, multi-column index, and cardinality.
Together with his colleagues at Metaphor, Kimball designed his first fact and dimension table
data warehouse, which was installed at Clorox in 1984.
Each dimension table
has a "current row flag" regardless of whether the slowly changing dimension approach is Type 1 or Type 2 currently.
Sagent simplifies common loading tasks such as synthetic key generation, key lookup to confirm fact and dimension table
data integrity, and time dimension creation.