How to append CTE results to main query output? - tsql

Question

I've created a TSQL query that pulls from two sets of tables in my database. The tables in the Common Table Expression are different from the tables in the main query. I'm joining on MRN and need the end result to contain accounts from both sets of tables. I've written the following query to this end:
with cteHosp as(
select Distinct p.EncounterNumber, p.MRN, p.AdmitAge
from HospitalPatients p
inner join Eligibility e on p.MRN = e.MRN
inner join HospChgDtl c on p.pt_id = c.pt_id
inner join HospitalDiagnoses d on p.pt_id = d.pt_id
where p.AdmitAge >=12
and d.dx_cd in ('G89.4','R52.1','R52.2','Z00.129')
)
Select Distinct a.AccountNo, a.dob, DATEDIFF(yy, a.dob, GETDATE()) as Age
from RHCCPTDetail c
inner join RHCAppointments a on c.ClaimID = a.ClaimID
inner join Eligibility e on c.hl7Id = e.MRN
full outer join cteHosp on e.MRN = cteHosp.MRN
where DATEDIFF(yy, a.dob, getdate()) >= 12
and left(c.PriDiag,7) in ('G89.4','R52.1','R52.2', 'Z00.129')
or (
DATEDIFF(yy, a.dob, getdate()) >= 12
and LEFT(c.DiagCode2,7) in ('G89.4','R52.1','R52.2','Z00.129')
)
or (
DATEDIFF(yy, a.dob, getdate()) >= 12
and LEFT(c.DiagCode3,7) in ('G89.4','R52.1','R52.2','Z00.129')
)
or (
DATEDIFF(yy, a.dob, getdate()) >= 12
and LEFT(c.DiagCode4,7) in ('G89.4','R52.1','R52.2','Z00.129')
)
order by AccountNo
How do I merge together the output of both the common table expression and the main query into one set of results?

Answer 1

Merge performs inserts, updates or deletes. I believe you want to join the cte. If so, here is an example.
Notice the cteBatch is joined to the Main query below.
with
cteBatch (BatchID,BatchDate,Creator,LogID)
as
(
select
BatchID
,dateadd(day,right(BatchID,3) -1,
cast(cast(left(BatchID,4) as varchar(4))
+ '-01-01' as date)) BatchDate
,Creator
,LogID
from tblPriceMatrixBatch b
unpivot
(
LogID
for Logs in (LogIDISI,LogIDTG,LogIDWeb)
)u
)
Select
0 as isCurrent
,i.InterfaceID
,i.InterfaceName
,b.BatchID
,b.BatchDate
,case when isdate(l.start) = 0 and isdate(l.[end]) = 0 then 'Scheduled'
when isdate(l.start) = 1 and isdate(l.[end]) = 0 then 'Running'
when isdate(l.start) = 1 and isdate(l.[end]) = 1 and isnull(l.haserror,0) = 1 then 'Failed'
when isdate(l.start) = 1 and isdate(l.[end]) = 1 and isnull(l.haserror,0) != 1 then 'Success'
else 'idunno' end as stat
,l.Start as StartTime
,l.[end] as CompleteTime
,b.Creator as Usr
from EOCSupport.dbo.Interfaces i
join EOCSupport.dbo.Logs l
on i.InterfaceID = l.InterfaceID
join cteBatch b
on b.logid = l.LogID