SQL Joining table with Min and Sec Min row - sql

Question

I want to join table 1 with table2 twice becuase I need to get the first minimum record and the second minimum. However, I can only think of using a cte to get the second minimum record. Is there a better way to do it?
Here is the table table:
I want to join Member with output table FirstRunID whose Output value is 1 and second RunID whose Output value is 0
current code I am using:
select memid, a.runid as aRunid,b.runid as bRunid
into #temp
from FirstTable m inner join
(select min(RunID), MemID [SecondTable] where ouput=1 group by memid)a on m.memid=a.memid
inner join (select RunID, MemID [SecondTable] where ouput=0 )b on m.memid=a.memid and b.runid>a.runid
with cte as
(
select row_number() over(partition by memid, arunid order by brunid ),* from #temp
)
select * from cte where n=1

Answer 1

You can use outer apply operator for this:
select * from t1
outer apply(select top 1 t2.runid from t2
where t1.memid = t2.memid and t2.output = 1 order by t2.runid) as oa1
outer apply(select top 1 t2.runid from t2
where t1.memid = t2.memid and t2.output = 0 order by t2.runid) as oa2

Answer 2

You can do this with conditional aggregation. Based on your results, you don't need the first table:
select t2.memid,
max(case when output = 1 and seqnum = 1 then runid end) as OutputValue1,
max(case when output = 0 and seqnum = 2 then runid end) as OutputValue2
from (select t2.*,
row_number() over (partition by memid, output order by runid) a seqnum
from t2
) t2
group by t2.memid;

Answer 3

declare #FirstTable table
(memid int, name varchar(20))
insert into #firsttable
values
(1,'John'),
(2,'Victor')
declare #secondtable table
(runid int,memid int,output int)
insert into #secondtable
values
(1,1,0),(1,2,1),(2,1,1),(2,2,1),(3,1,1),(3,2,0),(4,1,0),(4,2,0)
;with cte as
(
SELECT *, row_number() over (partition by memid order by runid) seq --sequence
FROM #SECONDTABLE T
where t.output = 1
union all
SELECT *, row_number() over (partition by memid order by runid) seq --sequence
FROM #SECONDTABLE T
where t.output = 0 and
t.runid > (select min(x.runid) from #secondtable x where x.memid = t.memid and x.output = 1 group by x.memid) --lose any O output record where there is no prior 1 output record
)
select cte1.memid,cte1.runid,cte2.runid from cte cte1
join cte cte2 on cte2.memid = cte1.memid and cte2.seq = cte1.seq
where cte1.seq = 1 --remove this test if you want matched pairs
and cte1.output = 1 and cte2.output = 0