what are variable ports and list two situations when they
can be used?
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Answer Posted / maruthi
VARIABLE PORT-WHCIH WE CAN CREATE IT IN MANY
TRANSFORMATIONS FOR VARIABLE CALCULATION PURPOSE.
CREATE ANY NEW PORT IN AGGREGATION AND USE IT TO
CALCULATE MAX(SAL) OR ANY OTHER CALCULATION,THEN IT BECOMES
VARAIBLE PORT.
IT IS CALLED AS VARABLE PORT ,BECOAUSE IT IS VALUE WILL BE
KEEP ON CHANGING AS THE ROWS ARE KEP ON CHANGING.
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