Reg:Appending or set

[deleted_user]

1) In a library i am having 400 datasets of daily transations with same variables.
How can i append all the datasets.
2) TO the datsets a new dataset is joining this folder per day (and i dont know the name of the new dataset)and i should append the new dataset to the old appended datsets ,how can i find the new dataset and how can i do this by macro.

[Patrick]

The question will be:
What exacty defines a new dataset and separates it from other data sets in the same library/folder?

"i should append the new dataset to the old appended datsets"
So you have sets of new data sets and sets of existing data sets - you might have to explain a bit better and give a clear example.

[Patrick]

Is this real world or excercise?

Your question sounds so related to this one:
http://support.sas.com/forums/thread.jspa?threadID=10544&tstart=0

And if this is the same excercise then why not read all the text files into one data set in first place.