如何獲取用逗號分隔的代碼字符串的相應逗號分隔文本？

我有一個表，有一個名爲「位置」的列在varchar（max）類型中。它攜帶一串逗號分隔的代碼，例如'1, 3, 4'。另一方面，我有一張將這些代碼映射到某些位置的表格，例如，如何獲取用逗號分隔的代碼字符串的相應逗號分隔文本？

1 -- British 
2 -- New Zealand 
3 -- Hong Kong 
4 -- Taiwan

我的問題是，我正在做圖，該將映射並替換列「位置」爲相應的逗號分隔的文本，例如內容'1, 3, 4'將爲'British, Hong Kong, Taiwan'

這對公司項目來說確實很緊急，敬請告知。

謝謝！

問候，威廉

來源

2011-04-12 William Choi

有可能是簡單的解決方案要做到這一點，但這裏是一個辦法。

表結構

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

測試數據

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')

查詢

;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

結果

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

來源

2011-04-12 09:58:54

如何獲取用逗號分隔的代碼字符串的相應逗號分隔文本？

回答

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