To delete datasets from libraries.
Syntax:-
Proc delete <options>;
Run;

Examples:-
Proc delete;
Run;
Its delete latest dataset
If latest dataset already deleted it shows warning in log
WARNING: File WORK.DS2.DATA does not exist.
Options:-
Data=dataset: – Specify dataset name which you want to delete
PROC DELETE DATA=DS1;
RUN;
Data=multiple datasets: – Specify multiple dataset names which you want to delete
PROC DELETE DATA=DS1 DS2 DS3;
RUN;
Data=_all_: – Deletes all datasets from specific library.
PROC DELETE DATA=_ALL_;
RUN;
Its delete dataset which you specified data=Library. Datasets
PROC DELETE DATA=MY_SAS.DS1;
RUN;