Answer / ramesh kumar

let me explain the ans for if the file is PS.
fist compute the value 100-80 into one ws-variable.
then read the file and add 1 to some ws-count variable upto 20th record then check for the conditon if it is 20th record
like if ws-variable = ws-count
if it is then write into o/p rec, now decresae 1 from ws-variable like subtract 1 from ws-variable
and read file again add 1 to ws-count then check for the conditon if it is 19 recrd then write into o/p rec.
perform until ws-variable=0.

Answer / karthick

Ya its simple.......
U can select these records as primary key in ksds cluster.
In cobol program you specify access as random. then select
particular records. and then sort it out in reverse order.

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