[英]Display result Data in single Row ,No matter For no. of column in Sql server
我有这种类型的查询,
select StateName ,countryName
from country_master left join state_master on country_master.countryID = state_master.countryID
产生以下结果,
古吉拉特邦印度
德里印度
HR印度
MP印度
纽约美国
洛杉矶美国
芝加哥美国
WDC USA
伦敦英国
我希望这个结果在单行中与它的关系如,
印度 - 古吉拉特邦德里HR MP
美国 - 纽约洛杉矶芝加哥英国 - 伦敦
有任何构建此查询的想法
建议我,谢谢,
这个问题本质上是将多行连接成单个文本字符串的重复? 。
这是一个在Sql Server 2008中工作的方法:
WITH Ranked ( countryID, rnk, stateName )
AS ( SELECT countryID,
ROW_NUMBER() OVER( PARTITION BY countryID ORDER BY countryID ),
CAST( stateName AS VARCHAR(8000) )
FROM state_master),
AnchorRanked ( countryID, rnk, stateName )
AS ( SELECT countryID, rnk, stateName
FROM Ranked
WHERE rnk = 1 ),
RecurRanked ( countryID, rnk, stateName )
AS ( SELECT countryID, rnk, stateName
FROM AnchorRanked
UNION ALL
SELECT Ranked.countryID, Ranked.rnk,
RecurRanked.stateName + ', ' + Ranked.stateName
FROM Ranked
INNER JOIN RecurRanked
ON Ranked.countryID = RecurRanked.countryID
AND Ranked.rnk = RecurRanked.rnk + 1 )
SELECT countryName, MAX( stateName )
FROM RecurRanked
INNER JOIN country_master on RecurRanked.countryID = country_master.countryID
GROUP BY countryName;
你可以在这里看到几种方法来实现这种技术: https : //www.simple-talk.com/sql/t-sql-programming/concatenating-row-values-in-transact-sql/
如果你的连续城市列表长度超过8000个字符,你需要小心,尽管如果这是一个问题,你可能能够做出像varchar(max)这样的事情(除了它可能的事实)不是一个非常好的方式来查看数据)。
Select t.countryName , isnull(Stuff((SELECT ', ' + StateName
FROM state_master where countryID = t.countryID
ORDER BY StateName
For XML PATH ('')),1,1,''),'') as c
from country_master t
select c.countryName,
stuff((select ' '+s.StateName
from state_master as s
where s.countryID = c.countryID
for xml path(''), type).value('.', 'nvarchar(max)'), 1, 1, '')
from country_master as c
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