combining two CTE in a single query - sql

Question

Here i have two CTE and i need to select values from these two CTE as a single query. I can able to select values from a single CTE at a time but i dont know like how to merge these two CTE and select values from both CTE.
Here int the below query i can able to select values from second CTE
DECLARE #now DateTime;
DECLARE #Firstweekstart DateTime;
DECLARE #FirstweekEnd DateTime;
SET #now = CONVERT(datetime, CONVERT(date,getdate()));
SET #Firstweekstart = DATEADD(
DD,
-(DATEPART(DW, #now - 7) - 1),
#now - 7);
SET #Firstweekstart = dateadd(ms, -1, #Firstweekstart)
SET #Firstweekend = DATEADD(
DD,
7 - (DATEPART(DW, #now - 7)),
#now - 7);
SET #Firstweekend = dateadd(ms, -3, #Firstweekend+1)
;WITH CTE1 AS
(
SELECT CHINFO.CHILDID,CHINFO.CONSUMERID,
DATEADD(DD, -(DATEPART(DW, CHINFO.Adddate)-1), CHINFO.Adddate) AS APPLICATIONUSAGESTARTDATE,
DATEDIFF(WW,CHINFO.Adddate,#now) AS WEEKNUMBER,
ROW_NUMBER() OVER
(PARTITION BY CHINFO.CHILDID ORDER BY CHINFO.Adddate ASC) AS RN
FROM BKA.CHILDINFORMATION CHINFO
LEFT OUTER JOIN BKA.CHILDEVENTS CHE
ON CHE.CHILDID = CHINFO.CHILDID
GROUP BY CHINFO.CHILDID,CHINFO.CONSUMERID,CHINFO.Adddate
)
,CTE2 as
(SELECT Distinct CHINFO.CHILDID ,CHE.TIMESTAMP
,ROW_NUMBER() OVER (PARTITION BY CHINFO.CHILDID ORDER BY CHE.TIMESTAMP) row
FROM BKA.CHILDINFORMATION CHINFO
JOIN BKA.CHILDEVENTS CHE
ON CHE.CHILDID = CHINFO.CHILDID
WHERE CHE.TYPE = 'pottybreak'
AND CHE.ADDDATE BETWEEN #Firstweekstart AND #Firstweekend
GROUP BY CHINFO.CHILDID,CHE.TIMESTAMP
)
SELECT
a.CHILDID ,
AVG(CONVERT(DECIMAl,DATEDIFF ( minute , b.TIMESTAMP , a.TIMESTAMP))) as CURRENTWEEKTIMERRESTART
FROM
CTE2 a
LEFT JOIN CTE2 b
on a.CHILDID = b.CHILDID
and a.row = b.row+1
group by a.childid
I need to merge the below query with the above one
SELECT CTE1.CONSUMERID,
CTE1.CHILDID,
CTE1.APPLICATIONUSAGESTARTDATE,
CTE1.WEEKNUMBER
FROM CTE1
WHERE RN = 1 ORDER BY CTE1.CHILDID ASC
Any suggestion?

Answer 1

If you are joining values from CTE1 and CTE2 based on CHILDID column then you can write as:
SELECT
CTE1.CONSUMERID,
CTE1.CHILDID,
CTE1.APPLICATIONUSAGESTARTDATE,
CTE1.WEEKNUMBER,
-- a.CHILDID ,
AVG(CONVERT(DECIMAl,DATEDIFF ( minute , b.TIMESTAMP , a.TIMESTAMP)))
as CURRENTWEEKTIMERRESTART
FROM
CTE2 a
LEFT JOIN CTE2 b on a.CHILDID = b.CHILDID and a.row = b.row+1
LEFT JOIN CTE1 on CTE1.CHILDID = a.CHILDID and CTE1.RN = 1
group by CTE1.CONSUMERID,CTE1.CHILDID,CTE1.APPLICATIONUSAGESTARTDATE,CTE1.WEEKNUMBER
ORDER BY CTE1.CHILDID ASC