Question 21170 in Mysql Question posted in
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SQL Find duplicated names and count it for each status – Mysql

I found 85 duplicated names in my base with

SELECT Name, COUNT(*) 
FROM Tab 
GROUP BY Name
HAVING COUNT(*) > 1
ORDER BY 2 DESC, 1;

with the result set:

Name    COUNT(*)
a   28
b   12
c   10
d   8
e   5
f   4
g   3
h   3
i   2
...

My concern is to sort these duplicated names (303 entries in total) per status

SELECT Status, COUNT(*) FROM Tab
WHERE Name IN (SELECT Name FROM Tab GROUP BY Name HAVING COUNT(*) > 1)
GROUP BY Status
ORDER by Name;

give me this result:

Status  COUNT(*)
Ended   38
Deleted 21
InUse   244

Now I would like a combinaison of both queries meaning to show the duplicated names counted by status.

Name Ended Deleted InUse
a 6 2 20
b 0 0 12
c 0 8 2
d 6 1 1
e 4 0 1
f 0 3 1
g 1 1 1
h 1 2 0
i 1 0 1

If I can have an extra column as Total will be great also but my main goal is to build a query for this result set

Tags:

2

Answers


  1. 0

    An example of Nathan_Sav’s suggestion –

    SELECT
    Name,
    SUM(Status = 'Ended') AS Ended,
    SUM(Status = 'Deleted') AS Deleted,
    SUM(Status = 'InUse') AS InUse,
    COUNT(*) AS Total
FROM Tab 
GROUP BY Name 
HAVING COUNT(*) > 1
ORDER BY InUse DESC
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  2. 0

    you can use Window function For Calculation Count and Create To Result with Pivot

    This Code work to use sql server

    DECLARE @cols AS NVARCHAR(MAX),@scols  AS NVARCHAR(MAX),
    @query  AS NVARCHAR(MAX)
select @cols = STUFF((SELECT distinct ',' + QUOTENAME([Status])  from Tab
                 FOR XML PATH(''), TYPE  ).value('.', 'NVARCHAR(MAX)')   ,1,1,'' )
 
 
select @scols = STUFF((SELECT distinct ',ISNULL(' + QUOTENAME([Status]) +',''0'') as '+  QUOTENAME([Status])
                 from Tab  FOR XML PATH(''), TYPE  ).value('.', 'NVARCHAR(MAX)')  ,1,1,'')
 

 set @query = 'SELECT   Name,'+@scols+' from 
             (
               
                select Name,[Status],CounStatus,Total
                from (
                select *,count(*) over (partition by Name,[Status]) as CounStatus
                ,count(*) over (partition by Name ) as Total
                ,ROW_NUMBER() over (partition by Name,[Status] order by [Status]) as rw
                from  Tab
                )d
                where  rw=1

            ) x
            pivot 
            (
               sum( CounStatus)  for [Status] in (' + @cols + ')
            ) p 
            
            '

execute(@query)

    You can to insert the basic data with the following codes

    create table Tab(Name nvarchar(100),Status nvarchar(100))
insert into tab (Name,Status)
select 'a' as Name,'Ended' as Status
go 6

insert into tab (Name,Status)
select 'a','Deleted'
go 2

insert into tab (Name,Status)
select 'a','InUse'
go 20

insert into tab (Name,Status)
select 'b','InUse'
go 12


insert into tab (Name,Status)
select 'c','Deleted'
go 8

insert into tab (Name,Status)
select 'c','InUse'
go 2

select Name,[Status],CounStatus,Total
from (
select *,count(*) over (partition by Name,[Status]) as CounStatus
,count(*) over (partition by Name ) as Total
,ROW_NUMBER() over (partition by Name,[Status] order by [Status]) as rw
from  Tab
)d
where  rw=1
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