अल्पविराम से अलग किए गए कोड की एक स्ट्रिंग के लिए संबंधित अल्पविराम से अलग पाठ कैसे प्राप्त करें?

ऐसा करने के लिए सरल उपाय हो सकते हैं लेकिन यह एक तरीका है।

टेबल संरचना

create table Locations(LocationID int, Location varchar(50))
create table OtherTable(ID int, Locations varchar(max))

परीक्षण डेटा

insert into Locations values(1, 'Location <1>')
insert into Locations values(2, 'Location <2>')
insert into Locations values(3, 'Location <3>')
insert into Locations values(4, 'Location <4>')
insert into Locations values(5, 'Location <5>')

insert into OtherTable values (1, '')
insert into OtherTable values (2, '2')
insert into OtherTable values (3, '1, 3 ,5')

प्रश्न

;with cte as
(
  select 
    T.ID,
    coalesce(L.Location, '') as Location
  from OtherTable as T
    cross apply
      (select cast('<r>'+replace(T.Locations, ',', '</r><r>')+'</r>' as xml)) LocXML(XMLCol)
    cross apply
      LocXML.XMLCol.nodes('r') LocID(IDCol) 
    left outer join Locations as L
      on L.LocationID = LocID.IDCol.value('.', 'int')
)
select
  C1.ID,
  stuff((select ', '+C2.Location
         from cte as C2 
         where C1.ID = C2.ID
         for xml path(''), type).value('text()[1]', 'nvarchar(max)'), 1, 2, '') as Locations
from cte as C1
group by C1.ID

परिणाम

ID  Locations
--- ----------------------------------------
1   
2   Location <2>
3   Location <1>, Location <3>, Location <5>