data x1;
input id sal ;
cards;
12 23
78 45
run;
data x2;
input id sal;
cards;
23 56
78 59
run;
data x3;
input id sal;
cards;
02 56
45 86
run;
data x_fin;
set x1 x3 x2;
run;
data x5;
input id sal;
cards;
02 56
45 86
run;
data x_fin;
set x1 x3 x2 x5 ;
run;
data x6;
input id sal;
cards;
02 56
45 86
run;
data x_fin;
set x1 x3 x2 x5 x6;
run;
i have created x_fin dataset by keeping x1,x2,x3 and after that i have added x5 and updated and after that i have added x6 to the dataset x_fin now.i want the dataset that was recently updated to x_fin and i should move that observations to a new dataset as x_updsets.so please help me out this is a example as Real time daily many datesets will come and set to one dataset now i want to find which dataset was added to it recently