Efficient way to delete specific rows of a SAS dataset on a SQL Server -



Efficient way to delete specific rows of a SAS dataset on a SQL Server -

i want delete latest 30 day records dataset. have couple of ways so.

proc sql; delete server.data date >= today() - 30; quit;

or

data server.data; set server.data(where= (date>= today() - 30)); run;

which way better? or faster procedures?

the first approach faster.

however approach leaves deleted observations in place (they marked deleted). causes difference between nobs , nlobs properties of table. if space consideration, i'd recommend sec approach (using macro variable constant in same manner). rebuild table without records. remember recreate indexes , constraints, destroyed in rebuild process..

edit: had suggested below faster, turned out not case - see joe's comment in thread..

proc sql; delete server.data date >= %eval(%sysfunc(today()) - 30);

sql-server sas delete-row sql-delete

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