Stage Variables and Constants
Describe the term Derivations, Stage Variables and Constants?
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a) Derivation - Expression which specifies value that can be passed on to the target column.
b) Stage Variable – It is defined as an intermediate processing variable which retains the value during read and does not pass the value to the target column.
c) Constant - Conditions that are either true or false which specifies that flow of the data along with a link.
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