Trying to create the table below, i.e. adding another condition in the codes where if there is same Event_date then only Count_done as 1. PROC SQL; Create Table want1 as select want.*, source.result_date, case when standard_days ge result_date and Event_date le result_date then '1' else '0' end as Count_done from want left join source on want.ID = source.ID; Quit; Current code produces this: ID Event_date Count_done 123456 17/07/2018 1 123456 17/07/2018 1 234567 12/07/2018 1 This is what I want: ID Event_date Count_done 123456 17/07/2018 1 123456 17/07/2018 0 234567 12/07/2018 1 Thanks in advance
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