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Q&A about the site for researchers and developers who explore the principles of a system through analysis of its structure, function, and operation

---based on this template: https://data.stackexchange.com/stackoverflow/query/1004129/multi-db-template-with-hostname

---I count posts with multiple duplicate targets multiple tims
---since I am using this: SUM(Case When (pl.LinkTypeId=3) Then 1 Else 0 End)
---However, I do not know an easy way to correct this.

declare @sql nvarchar(max)

create table #result (site sysname
                    , hostname sysname
                    , countdeldupl integer
                    , countdelall integer
                    , percentage decimal(5,2)
                    )

select @sql = N'insert into #result' + STRING_AGG(concat(N'
select ''', name ,N''' as site
     , ''',hostname ,N'''
     , count(distinct Case When (pl.LinkTypeId=3) Then pl.PostId Else null End)
     , COUNT(DISTINCT p.Id) 
     , ROUND((CAST((count(distinct Case When (pl.LinkTypeId=3) Then pl.Postid Else null End)) AS decimal))*100.0/(CAST((COUNT(DISTINCT p.Id)) AS decimal)),2)
from ', quotename(name), N'.dbo.postlinks pl
right outer join ', quotename(name), N'.dbo.postswithdeleted p on
  pl.PostId=p.Id
where (p.PostTypeId=1) AND (p.DeletionDate IS NOT NULL)
'),N' 
union all')
from (select convert(nvarchar(max),name) name
    -- , convert(nvarchar(max),sitename)  sitename
    -- , meta
    -- , domain
     ,  concat( 
        -- based on an idea from Glorfindel 
        -- https://meta.stackexchange.com/a/321181
        (case sitename
        WHEN 'Audio' THEN 'video'
        WHEN 'Beer' THEN 'alcohol'
        WHEN 'CogSci' THEN 'psychology'
        WHEN 'Garage' THEN 'mechanics'
        WHEN 'Health' THEN 'medicalsciences'
        WHEN 'Moderators' THEN 'communitybuilding'
        WHEN 'Photography' THEN 'photo'
        WHEN 'Programmers' THEN 'softwareengineering'
        WHEN 'Vegetarian' THEN 'vegetarianism'
        WHEN 'Writers' THEN 'writing'
        WHEN 'Br' THEN 'pt'
        WHEN 'Mathoverflow' THEN concat((meta+'.'), sitename)
        ELSE case when sitename = domain then null else sitename end
        end +'.')
        , (case 
           when sitename <> 'mathoverflow' then (meta+'.') 
           else null 
           end) 
        , (case 
           when sitename <> 'mathoverflow' then concat((domain + '.'), 'com') 
           else 'net' 
           end)
        ) hostname
from (
select name
, case parsename(name,1) 
  when 'Meta' then parsename(name,2)
  else parsename(name,1) 
  end [sitename]
, case parsename(name,1) 
  when 'Meta' then 'meta'
  else null
  end [meta]
  , coalesce(parsename(name,3), parsename(name,2)) [domain]
from sys.databases
where database_id > 5
and (name not like '%.Meta' or name = 'StackExchange.Meta')
) dbs
) dbsall

exec (@sql)



select *
from #result
order by percentage DESC

fork query

edited dec 10

created dec 10 Martin20528