Find Duplicate Phones using cte by comparing against other groups - sql

Question

I am trying to determine how many duplicate work phones I can find in Group 94 by comparing against all other groups that are active.
Contacts are grouped using GroupId
The ContactTable Only contains ids and NOT Phones
The DetailedContactTable contains phones
The ContactSummaryTable contains Group status
The sql is working by setting rownumber for each duplicate Workphone > 1.
The problem is that is setting the rownumber > 1 for all groups except for 94. I need to know 94 first and foremost. Any idea how I set rownumber > 1 for duplicates in GroupId 94 first?
DECLARE #GroupID Int
SET #GroupID = 94
;WITH cte AS
(
SELECT ROW_NUMBER() OVER (PARTITION BY d.WorkPhone ORDER BY c.id DESC)
AS rownumber
,d.WorkPhone
,c.id
,GroupID
FROM ContactTable c
INNER JOIN DetailedContactTable d
ON c.DetailedContactId = d.id
WHERE c.GroupID IN
(
SELECT id
FROM ContactSummaryTable WHERE id = #GroupID
OR GroupActive = 1
)
AND NOT d.WorkPhone IS NULL
AND d.WorkPhone <> ''
)
SELECT * FROM cte WHERE rownumber > 1
ORDER BY GroupID;

Answer 1

DECLARE #GroupID INT;
SET #GroupID = 94;
WITH BaseGroup
AS
(
SELECT c.GroupID
,d.WorkPhone
,c.id ContactID
FROM ContactTable c
INNER JOIN DetailedContactTable d ON c.DetailedContactId = d.id
WHERE c.GroupID = #GroupID
AND NOT d.WorkPhone IS NULL
AND d.WorkPhone <> ''
),
OtherGroups
AS
(
SELECT
d.WorkPhone
FROM ContactTable c
INNER JOIN DetailedContactTable d ON c.DetailedContactId = d.id
WHERE c.GroupID <> #GroupID
AND NOT d.WorkPhone IS NULL
AND d.WorkPhone <> ''
AND EXISTS (
SELECT *
FROM ContactSummaryTable WHERE id = c.GroupID
AND GroupActive = 1)
)
SELECT a.*
FROM BaseGroup a
INNER JOIN OtherGroups b ON a.WorkPhone = b.WorkPhone
ORDER BY a.WorkPhone
or
SELECT a.*, CASE WHEN b.WorkPhone IS NULL THEN 'no duplicate' ELSE 'duplicate' END [Status]
FROM BaseGroup a
LEFT JOIN OtherGroups b ON a.WorkPhone = b.WorkPhone
ORDER BY a.WorkPhone