Hi after getting the min an max with your help I need to see if machine on the same id were down at the same time I have a macro that does that it looks like this % macro r (×,n);&x. As &x.&n. &mend; proc sql;Create table want as select a.id ,a.date , a.%r (number, 1),a.%r (min_time,1),a.%r (max_time,1),a.%r (dur_time,1), B.id ,a.date , a.%r (number, 2),b.%r (min_time,3),b.%r (max_time,2),b.%r (dur_time,3) from fix as a inner join fix as b on a.Id=b.id where (a.max_time gt b.min_time) And a.max_time LT b.max_time ) Or ( a.max_time eq b.max_time And input (substr(a . number, 3,4)4.) LT input (substr( b.number,3,4.) ); Run; What I get is if there are only 2 machines that overlap between there min an max time it works great ...but if there were 3 or 4 machined brought down it combined machine 1 with 2nd machine than in 2nd row it adds machine 1 to machine 3 I would like if machine 3 or 4 were all part of the first 2... I wonder if it's because I'm only refer a.b. I should c and d as well ? Thanks for help
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