Group by select based on OR condition - mysql

Question

After using UNION with two select queries, I'm getting following results
UserId Name Status
------ ------ --------
1 User1 Active
2 User2 Active
1 User1 InActive
3 User3 InActive
But the expected results is
UserId Name Status
---------------------
1 User1 Active
2 User2 Active
3 User3 InActive
Here what I need is, I want to group by column Id and get status as Active if any one result is active. How to form a SQL query for this?
Can anyone suggest query for any one of the following DB?
MSSQL
Oracle
MySQL
PostgreSQL
Edit:
This is the query I've tried in PostgreSQL
(SELECT DISTINCT User.Id,User.DisplayName,AppAccessToUsers.IsActive='1' AND User.IsActive='1' AS IsStatusActive
FROM Applications Left JOIN AppAccessToUsers ON (Applications.Id=AppAccessToUsers.ApplicationId)
Left JOIN User ON (AppAccessToUsers.UserId=User.Id) WHERE Applications.ClientId='e7e66c1b-b3b8-4ffb-844b-fc4840803265')
UNION
(SELECT DISTINCT User.Id,User.DisplayName,AppAccessToGroups.IsActive='1' AND Group.IsActive='1' AND UserGroup.IsActive='1' AND User.IsActive='1' AS IsStatusActive
FROM Applications Left JOIN AppAccessToGroups ON (Applications.Id=AppAccessToGroups.ApplicationId)
Left JOIN Group ON (AppAccessToGroups.GroupId=Group.Id) Left JOIN UserGroup ON (Group.Id=UserGroup.GroupId)
Left JOIN User ON (UserGroup.UserId=User.Id) WHERE Applications.ClientId='e7e66c1b-b3b8-4ffb-844b-fc4840803265')

Answer 1

Use this query,
SELECT UserId
,Name
,CASE WHEN min(status) = 'Active' THEN 'Active' ELSE 'InActive' END
FROM users GROUP BY UserId,Name

Answer 2

I would do the following, assuming a) your tables are called t1 and t2 (amend as appropriate for your actual table names) and b) the names for each userid in both tables are the same - ie. for userid = 1, both tables have the same name:
SELECT userid,
NAME,
MIN(status)
FROM (SELECT userid, NAME, status FROM t1
UNION ALL
SELECT userid, NAME, status FROM t2)
GROUP BY userid, NAME;
This works in Oracle, and I'm pretty sure it'll work in the other database platforms you mentioned.
N.B. I used MIN(status) since you appear to want a status of Active to override a status of Inactive, and A comes before I in the alphabet.

Answer 3

In Sql-server, you could use group by or Row_number like this
DECLARE #SampleData AS TABLE
(
UserId int,
Name varchar(20),
Status varchar(10)
)
INSERT INTO #SampleData
(
UserId,Name,Status
)
VALUES
(1,'User1', 'Active'),
(2,'User2', 'Active'),
(1,'User1', 'InActive'),
(3,'User3', 'InActive')
-- use row_number
;WITH temp AS
(
SELECT *, row_number() OVER(PARTITION BY sd.UserId ORDER BY sd.Status ) AS Rn
FROM #SampleData sd
)
SELECT t.UserId, t.Name, t.Status
FROM temp t WHERE t.Rn = 1
--or use group by
SELECT sd.UserId, sd.Name, min(sd.Status) AS status
FROM #SampleData sd
GROUP BY sd.UserId, sd.Name
Results:
UserId Name Status
1 User1 Active
2 User2 Active
3 User3 InActive

Answer 4

In case of MS Sql Server you can try row_number
;with cte as (
select top 1 with ties * from
( select * from #youruser
union all
select * from #youruser) a
order by row_number() over (partition by userid order by [status] desc)
) select * from cte where status = 'Active'

Answer 5

select your_table.* from your_table
inner join (
select UserId, min(Status) as st from your_table
group by UserId
) t
on your_table.UserId = t.UserId and your_table.Status = t.st
Note: if same UserId can have same Status more than 1 times, then this returns duplicated results.

Answer 6

;With cte (UserId, Name,Status)
AS
(
SELECT 1,'User1','Active' Union all
SELECT 2,'User2','Active' Union all
SELECT 1,'User1','InActive' Union all
SELECT 3,'User3','InActive'
)
SELECT UserId
,NAME
,[Status]
FROM (
SELECT *
,ROW_NUMBER() OVER (
PARTITION BY UserId
,NAME ORDER BY STATUS
) AS Seq
FROM cte
) dt
WHERE dt.Seq = 1
OutPut
UserId Name Status
-----------------------
1 User1 Active
2 User2 Active
3 User3 InActive

Answer 7

for postgres you can use CASE and bool_or, eg:
t=# with a(i,n,b) as (
values (1,'a','active'), (1,'a','inactive'), (2,'b','inactive'), (2,'b','inactive')
)
select i,n,case when bool_or(b = 'active') then 'active' else 'inactive' end
from a
group by i,n
;
i | n | case
---+---+----------
1 | a | active
2 | b | inactive
(2 rows)

Answer 8

Another approach:
Note : Group by is to remove duplicate
select
A.USERID, A.NAME,A.STATUS
from TAB_1 A
LEFT JOIN
(SELECT * FROM TAB_1 WHERE STATUS='Active') B
ON A.USERID=B.USERID
WHERE
( B.STATUS IS NULL OR A.STATUS=B.STATUS)
GROUP BY A.USERID, A.NAME,A.STATUS
ORDER BY A.USERID
;