Principal types of packaged data models
Write a short on the differences of the two principal types of packaged data models.
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Universal data models are ordinary to many organizations. Such models might be useful for same functions which are employed across organizations or companies like accounting and purchasing. Industry-specific data models are employed by specific industries.
Explain the term operational data stage (ODS) and data warehouse?
How are metadata keys and surrogate handled in MySQL?
Write about the term Attribute, Entity and Relationship?
Briefly describe time series algorithm in data mining?
Explain the term Coalesce. Answer: Coalesce is also obtainable in Sybase, this function estimates the listed expressions and returns the first non-null value.
Write down the employ of incremental aggregation?
What are sequences, and what are the possible problems when employing them to make surrogate keys?
Describe briefly Aggregate transformation?
What is an Operational Data Store?
Describe briefly Recovering sessions?
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