hi

Main difference b/w sequential file and dataset is : Sequential stores small amount of data and stores normally.But dataset load the data like ansi format.

hi all

sequential file:

it act as a source & permanent storage for target.it 's extend is .txt.

dataset:

it act as a temporary storage stage mainly it used before the target stage

while using this stage the ip datas r partited &convert into internal dataset format.then it is easy to load the data in target stage .

copy:

it act as a placeholder.it has a single ip &many o/p .

if u want 2 add a new stage in ur job at that time it is very easy otherwise u have to modify that whole job.