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10.3
What Can the MODEL Clause Do?
PRESENTV(<cell>, <expression>, <expression>)
. As for PRES-
ENTNNV, but allowing NULL values.
PREVIOUS(<cell>)
. Returns a value at the beginning of each itera-
tion or loop.
ITERATION_NUMBER. Returns a completed loop iteration
sequence number or the subscript of a loop.
10.3 What Can the MODEL Clause Do?
The answer to this question is quite simple: LOTS! And the easiest way to
explain all the incredible capabilities of the MODEL clause is to demon-
strate by example.
The objective of this book is performance. Therefore going through all
the capabilities of the MODEL clause in detail would essentially be dupli- ...