SQL Set operators are conceptually derived from the mathematical set principle. The three fundamental set operators are UNION, INTERSECT, and EXCEPT. All three, with variations (in particular, OUTER UNION) and […]
PROC SQL in SASis a Procedure that combines the functionality of DATA and PROC steps into a single step. PROC SQL can perform sorting of data, creating summaries of data, subsetting, joining (merge), concatenation of datasets, create new or calculated variables, printing the results or create a new table or view all in a single step.
