如何在SQL Server中连接字符串,并按不同列进行排序/排序?
我在SQLServer中看到了许多连接字符串的示例,但是如果它们担心排序,那么总是根据连接的列进行。 我需要根据不同字段中的数据对值进行排序 样本表:如何在SQL Server中连接字符串,并按不同列进行排序/排序?,sql,sql-server,concatenation,Sql,Sql Server,Concatenation,我在SQLServer中看到了许多连接字符串的示例,但是如果它们担心排序,那么总是根据连接的列进行。 我需要根据不同字段中的数据对值进行排序 样本表: ClassID | StudentName | SortOrder ----------------------------- A |James |1 A |Janice |3 A |Leonard |2 B |Luke |2
ClassID | StudentName | SortOrder
-----------------------------
A |James |1
A |Janice |3
A |Leonard |2
B |Luke |2
B |Leia |1
B |Artoo |3
我想得到的结果是:
ClassID |StudentName
--------------------------------
A |James, Leonard, Janice
B |Leia, Luke, Artoo
如何在SQL Server 2016中做到这一点?
(我期待着2017年的STRING_AGG,但我们还没有实现…)
谢谢 给你:
SELECT
s1.ClassID
, STUFF((SELECT
',' + s2.StudentName
FROM dbo.Student AS s2
WHERE s1.classID = s2.ClassID
ORDER BY s2.SortOrder
FOR XML PATH('')), 1, 1, '') AS StudentNames
FROM dbo.Student AS s1
GROUP BY s1.ClassID
这里是问题
IF OBJECT_ID('tempdb..#Temp') IS NOT NULL DROP TABLE #Temp;
CREATE TABLE #Temp(ClassId varchar(10),studName varchar(100),SortOrder int)
INSERT INTO #Temp(ClassId , studName, SortOrder)
SELECT 'A','James',1 UNION ALL
SELECT 'A','Janice',3UNION ALL
SELECT 'A','Leonard',2 UNION ALL
SELECT 'B','Luke',2 UNION ALL
SELECT 'B','Leia',1 UNION ALL
SELECT 'B','Artoo',3
-- select * from #Temp
select
distinct
stuff((
select ',' + u.studName
from #Temp u
where u.studName = studName and U.ClassId = L.ClassId
order by u.SortOrder
for xml path('')
),1,1,'') as userlist,ClassId
from #Temp L
group by ClassId
MS SQL Server 2017架构设置:
CREATE TABLE MyTable(ClassID varchar(255),StudentName varchar(255),SortOrder int)
INSERT INTO MyTable(ClassID,StudentName,SortOrder)VALUES('A','James',1),('A','Janice',3),('A','Leonard',2),
('B','Luke',2),('B','Lela',1),('B','Artoo',3)
SELECT
t.ClassID
, STUFF((SELECT
',' + t1.StudentName
FROM MyTable t1
WHERE t.classID = t1.ClassID
ORDER BY t1.SortOrder
FOR XML PATH('')), 1, 1, '') AS StudentNamesConcat
FROM MyTable AS t
GROUP BY t.ClassID
| ClassID | StudentNamesConcat |
|---------|----------------------|
| A | James,Leonard,Janice |
| B | Lela,Luke,Artoo |
查询1:
CREATE TABLE MyTable(ClassID varchar(255),StudentName varchar(255),SortOrder int)
INSERT INTO MyTable(ClassID,StudentName,SortOrder)VALUES('A','James',1),('A','Janice',3),('A','Leonard',2),
('B','Luke',2),('B','Lela',1),('B','Artoo',3)
SELECT
t.ClassID
, STUFF((SELECT
',' + t1.StudentName
FROM MyTable t1
WHERE t.classID = t1.ClassID
ORDER BY t1.SortOrder
FOR XML PATH('')), 1, 1, '') AS StudentNamesConcat
FROM MyTable AS t
GROUP BY t.ClassID
| ClassID | StudentNamesConcat |
|---------|----------------------|
| A | James,Leonard,Janice |
| B | Lela,Luke,Artoo |
:
CREATE TABLE MyTable(ClassID varchar(255),StudentName varchar(255),SortOrder int)
INSERT INTO MyTable(ClassID,StudentName,SortOrder)VALUES('A','James',1),('A','Janice',3),('A','Leonard',2),
('B','Luke',2),('B','Lela',1),('B','Artoo',3)
SELECT
t.ClassID
, STUFF((SELECT
',' + t1.StudentName
FROM MyTable t1
WHERE t.classID = t1.ClassID
ORDER BY t1.SortOrder
FOR XML PATH('')), 1, 1, '') AS StudentNamesConcat
FROM MyTable AS t
GROUP BY t.ClassID
| ClassID | StudentNamesConcat |
|---------|----------------------|
| A | James,Leonard,Janice |
| B | Lela,Luke,Artoo |
您也可以尝试使用PIVOT。这将支持更旧版本的SQL server。
唯一的限制:您应该知道最大排序器值。下面的代码将适用于SortOrder尝试在之前排序(考虑WITH子句),然后在SQLAggregateUse窗口函数中进行排序,但下次,请不要以图像形式提交示例数据和结果,而应以文本形式提交:)这非常有效,谢谢!(下次我一定要以文本形式提交样本数据)我编辑了问题,将内联样本而不是图像包括在内;-)