Explain append procedure?
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Difference between informat and format?
What is the maximum length of the macro variable?
Can you use a macro within another macro? If so how would SAS know where the current acro ended and the new one began?
What is the difference between class statement and by statement in proc means?
How does SAS handle missing values in: assignment statements, functions, a merge, an update, sort order, formats, PROCs?
define table lookup and how may ways it can be done...explian
You need to perform an analysis on a massive dataset by groups, but are unable to sort the data due to memory constraint. How would you accomplish the task?
What are the five ways to do a table lookup in sas? : sas-grid-administration
data task; input id date date9. visit; cards; 101 01jan2015 1 101 02jan2015 2 101 06jan2015 3 102 04jan2015 1 102 07jan2015 2 102 12jan2015 3 103 06jan2015 1 103 13jan2015 2 ; run; write a program to find out missing dates between visits by each subject.
why is sas data integration studio important? : Sas-di
What is instream data in SAS?
What are the best sas programming practices for handling very large datasets? : sas-grid-administration