Question

所以我有一个看起来像这样的表：

Name                 ID           TaskID           HoursAssigned
----------------------------------------------------------------
John Smith           4592         A01              40
Matthew Jones        2863         A01              20
Jake Adams           1182         A01              100
Matthew Jones        2863         A02              50
Jake Adams           2863         A02              10

我希望返回一个如下所示的数据集：

TaskID               PeopleAssigned
------------------------------------------------------------
A01                  Jake Adams, John Smith, Matthew Jones
A02                  Matthew Jones, Jake Adams

这里的问题是我不知道有多少人被分配到给定的任务。任何建议都会很棒！

Answer 1

这个问题每天都在这里提出。 Here is yesterday's。并another one

https://stackoverflow.com/questions/tagged/sql+string-concatenation

Answer 2

尝试这个：

declare @table table (name varchar(30), ID int, TaskID char(3), HoursAssigned int)

insert into @table values ('John Smith'   ,4592 ,'A01'  ,40)
insert into @table values ('Matthew Jones',2863 ,'A01'  ,20)
insert into @table values ('Jake Adams'   ,1182 ,'A01'  ,100)
insert into @table values ('Matthew Jones',2863 ,'A02'  ,50)
insert into @table values ('Jake Adams'   ,2863 ,'A02'  ,10)

--formatted so you can see what is happening
SELECT DISTINCT
    t1.TaskID
       ,SUBSTRING(
                  replace(
                          replace(
                                  (SELECT
                                       t2.Name
                                       FROM @Table AS t2
                                       WHERE t1.TaskID=t2.TaskID
                                       ORDER BY t2.Name
                                       FOR XML PATH(''))
                                 ,'</NAME>','')
                         ,'<NAME>',', ')
                 ,3,2000)  AS PeopleAssigned
    FROM @table AS t1

基于昨天的答案！

这是输出：

(1 row(s) affected)

(1 row(s) affected)

(1 row(s) affected)

(1 row(s) affected)

(1 row(s) affected)
TaskID PeopleAssigned
------ --------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
A01    Jake Adams, John Smith, Matthew Jones
A02    Jake Adams, Matthew Jones

(2 row(s) affected)

Answer 3

和BTW，将名称存储在一个字段中是个坏主意。使查询变得非常困难。如果不使用通配符作为阻止数据库使用索引的第一个字符，您将如何有效地搜索“Smith”。如果名字像这样存放自由形式，那么一个人可能是“约翰史密斯”，“史密斯，约翰”，“史密斯，约翰”，“史密斯，约翰”等等，你不会意识到他们是同一个人。您应该在最小值具有first_name，middle_name，last_name，personal_Suffix，然后您可以使用一个计算字段，以您希望显示的格式显示完整名称。

Answer 4

我是sql的新手，也是stackoverflow的新手，但这不会有用吗？

SELECT taskid，name FROM table GROUP BY taskid

在SQL Server中将多个字段合并到一个文本字段中

4 个答案: