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Question: What is a look up table?

Answer: A look up table is nothing but a 'look up' it give values to referenced table (it is a reference), it is used at the run time, it saves joins and space in terms of transformations. Example, a look up table called states, provide actual state name ('Texas') in place of TX to the output.

A look up table is nothing but a 'look up' it give values to referenced table (it is a reference), it is used at the run time, it saves joins and space in terms of transformations. Example, a look up table called states, provide actual state name ('Texas') in place of TX to the output.
Source: CoolInterview.com

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