'Query in getting multiple duplicate rows in SQL Server
I have 2 tables Table1 and Table2 in which I want to get the total count of duplicate rows:
Expected output:
Query tested:
SELECT
t1.name,
t1.duplicates,
ISNULL(t2.active, 0) AS active,
ISNULL(t3.inactive, 0) AS inactive
FROM
(SELECT
t1.name, COUNT(*) AS duplicates
FROM
(SELECT c.name
FROM table1 c
INNER JOIN table2 as cd on cd.id = c.id)) t1
GROUP BY
name
HAVING
COUNT(*) > 1) t1
LEFT JOIN
(SELECT c.name, COUNT(*) AS active
FROM table1 c
WHERE name IN (SELECT c.name FROM table1 c)
GROUP BY c.name AND status = 'Active'
GROUP BY name) t2 ON t1.name = t2.name
LEFT JOIN
(SELECT c.name, COUNT(*) AS inactive
FROM table1 c
WHERE name IN (SELECT c.name FROM table1 c GROUP BY c.name)
AND status = 'InActive'
GROUP BY name) t3 ON t1.name = t3.name
ORDER BY
name
It is still returning duplicate rows and I'm unable to get the id and creator column
Solution 1:[1]
If you would pardon subquery and left join, i'd suggest the following query:
select b.*,
count(creator) as creator_count
from
(select a.mainid,
a.name,
sum(case when a.status = "active"
then 1 else 0 end) as active_count,
sum(case when a.status = "inactive"
then 1 else 0 end) as inactive_count,
count(a.name) as duplicate_count
from table1 as a
group by a.name
having count(a.name) > 1) as b
left join table2 as c
on b.mainid = c.mainid
group by c.mainid
having count(c.creator) > 1
rather than forcing our way to join the two table directly. First, derive the information we can get from the Table1 then join it with the Table2 to get the creator count.
SQL Fiddle: http://sqlfiddle.com/#!9/4daa19e/28
Sources
This article follows the attribution requirements of Stack Overflow and is licensed under CC BY-SA 3.0.
Source: Stack Overflow
| Solution | Source |
|---|---|
| Solution 1 | Bagus Tesa |



