Removing observations using matched group

[shrutisd0]

I have a 3:1 nested case control matched sample dataset with match_id assigned per group

id	match_id	event
1	1	0
4	1	0
9	1	0
10	1	1
5	2	0
11	2	0
12	2	0
13	3	1
8	3	0
16	3	0
17	3	0

I want to remove observations who have less than 4 of the same match_id (in this example observations with match_id=2). 

[A_Kh · Accepted solution]

proc sql;
	create table have1 as
		select*, count(*) as total_id
			from have
		group by match_id;
quit; 
proc print;run; 
data want;
	set have1;
	where total_id gt 3;
proc print;run;