CTE Missing Records - sql

Question

The first query listed below returns some logistical data associated with hires that have been made within a particular period of time. The query returns 478 records.
SELECT c.candidate_id AS candidate_id
,o.name
,j.name AS job_title
,c.applied_from
,job_id AS job_id
,cjs.score AS smart_rank_score
,cjs.is_completed AS smartrank_completion_status
,c.hired_at
FROM candidate_jobs c
LEFT JOIN organizations o ON o.id = c.organization_id
LEFT JOIN candidate_job_surveys cjs ON cjs.candidate_job_id = c.id
LEFT JOIN jobs j ON j.id = c.job_id
WHERE o.name LIKE ANY ('{"%Tutor Doctor%"}')
AND c.hired_at :: date BETWEEN '2015-01-01' AND '2016-02-22'
ORDER BY 8 DESC
However, when I attempted to add a CTE (see below) that displays each hire's final "post hire check in score", the query only returns 236 records. Ideally, I'd like the query to either return a score or null value for each of the initial 478 hire records.
WITH final_post_hire_score (candidate_id, final_score) AS
(SELECT c.candidate_id
,p.score
FROM post_hire_followup_reviews p
LEFT JOIN candidate_jobs c ON c.id = p.candidate_job_id
WHERE p.check_in_number = 3)
SELECT c.candidate_id AS candidate_id
,o.name
,j.name AS job_title
,c.applied_from
,job_id AS job_id
,cjs.score AS smart_rank_score
,cjs.is_completed AS smartrank_completion_status
,c.hired_at
,final_score
FROM final_post_hire_score f
LEFT JOIN candidate_jobs c ON c.candidate_id = f.candidate_id
LEFT JOIN organizations o ON o.id = c.organization_id
LEFT JOIN candidate_job_surveys cjs ON cjs.candidate_job_id = c.id
LEFT JOIN jobs j ON j.id = c.job_id
WHERE o.name LIKE ANY ('{"%Tutor Doctor%"}')
AND c.hired_at :: date BETWEEN '2015-01-01' AND '2016-02-22'
ORDER BY 8 DESC

Answer 1

Missing records are due to the filter's, Move the filter's to ON condition else your LEFT OUTER JOIN will be implicitly converted to INNER JOIN
When you are using LEFT OUTER JOIN right table filter's should be present in ON condition else the NULL values for non matching records will get filtered
WITH final_post_hire_score (candidate_id, final_score)
AS (SELECT c.candidate_id,
p.score
FROM post_hire_followup_reviews p
LEFT JOIN candidate_jobs c
ON c.id = p.candidate_job_id
WHERE p.check_in_number = 3)
SELECT c.candidate_id AS candidate_id,
o.NAME,
j.NAME AS job_title,
c.applied_from,
job_id AS job_id,
cjs.score AS smart_rank_score,
cjs.is_completed AS smartrank_completion_status,
c.hired_at,
final_score
FROM final_post_hire_score f
LEFT JOIN candidate_jobs c
ON c.candidate_id = f.candidate_id
AND c.hired_at :: date BETWEEN '2015-01-01' AND '2016-02-22'
LEFT JOIN organizations o
ON o.id = c.organization_id
AND o.NAME LIKE ANY ( '{"%Tutor Doctor%"}' )
LEFT JOIN candidate_job_surveys cjs
ON cjs.candidate_job_id = c.id
LEFT JOIN jobs j
ON j.id = c.job_id
ORDER BY 8 DESC

Answer 2

I think there's an extra
WHERE p.check_in_number = 3
that isn't anywhere else.