Count Ids zgodnie z wystąpieniami z różnych kolumn w SQL Server - sql-server

Mam tabelę z dwiema kolumnami MentionedUserIds (nvarchar) i CreatedUserId (int).

Chcia

Id MentionedUserId CreatorUserId
--------------------------------
1    10,11,12,13     4
2    10,13,15,4      5

Potrzebuję takiego wyniku:

UserId MentionedUserCount CreatorUserCount
-------------------------------------------
4        1                  1
5        0                  1
10        2                  0
11        1                  0
12        1                  0
13        2                  0
15        1                  0

Użytkownicy są przechowywani w innej tabeli.

Odpowiedzi:

Pytanie jest trywialne po znormalizowaniu danych. Można to zrobić za pomocą dowolnej liczby plików funkcje lub sztuczki.

Z dostępnym wyszukiwaniem pełnotekstowym firmy Microsoft:

With Src As (
Select * From (Values
(1, "10,11,12,13", 4),
(2, "10,13,15,4" , 5)
) V (Id, MentionedUserId, CreatorUserId)
), Normalised As (
Select CreatorUserId, CAST(display_term AS int) As MentionedUserId
From Src
Cross Apply (
Select display_term
From sys.dm_fts_parser(""" + MentionedUserId + """, 1033, 0, 0)
Where display_term NOT Like "nn%"
) Split
), UserList As (
Select CreatorUserId As UserId From Normalised Union
Select MentionedUserId         From Normalised
)
Select UserId,
(Select Count(*) From Normalised Where MentionedUserId = UserId) As MentionedUserCount,
(Select Count(*) From Src        Where CreatorUserId   = UserId) As CreatorUserCount
From UserList;

Poprzez sztuczkę XML:

With Src As (
Select * From (Values
(1, "10,11,12,13", 4),
(2, "10,13,15,4" , 5)
) V (Id, MentionedUserId, CreatorUserId)
), Normalised As (
Select CreatorUserId, y.i.value("(./text())[1]", "int") As MentionedUserId
From Src
Cross Apply (Select CONVERT(XML, "<i>" + REPLACE(MentionedUserId, ",", "</i><i>") + "</i>").query(".") As x) As a
Cross Apply x.nodes("i") As y(i)
), UserList As (
Select CreatorUserId As UserId From Normalised Union
Select MentionedUserId         From Normalised
)
Select UserId,
(Select Count(*) From Normalised Where MentionedUserId = UserId) As MentionedUserCount,
(Select Count(*) From Src        Where CreatorUserId   = UserId) As CreatorUserCount
From UserList;