How To Use " IF -THEN -ELSE " In Proc SQL - SAS - Interview Question

In this video, I have covered CASE WHEN IN SAS. if you guys have any doubts kindly write in the comments.
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[@Knowledgegreenone]

Hi can you explain example when we have to print observations 5 through 10 from a dataset

[@divyanshu9535]

For that we use obs and firstobs
ua-cam.com/video/t2GNRoz7kbw/v-deo.htmlsi=iGmca-vjkj5blc1A
U can watch this video

[@Knowledgegreenone]

Can you tell one example explaining both one scenario through proc sql and same scenario through datastep?

[@divyanshu9535]

@@Knowledgegreenone for if then else ?

[@Knowledgegreenone]

@@divyanshu9535 like consider one scenario write a query in both sas and sql to identify the list of students who do not live in any country this one through datastep and proc sql

[@divyanshu9535]

@@Knowledgegreenone I'll make a video on it whenever I get time