合并多个字段到一个文本字段中的SQL Server

Question

所以我有一个表，看起来像这样：

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

和我想返回的数据集是这样的：

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

这里的问题是，我根本不知道有多少人在分配给一个给定的任务。任何建议将是巨大的！

Answer 1

此问题是每天在这里问。 这是昨天的。和另一个

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

Answer 2

尝试：

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

根据昨天的答案！

这里是输出：

(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

和顺便说一句，它是一个坏主意存储在一个字段名。使得它很难查询。你将如何有效地搜索“史密斯” withouth的使用通配符作为使用索引排除了数据库中的第一个字符。如果名称存储自由这样的，一个人可能是“约翰·史密斯”，“史密斯，约翰”，“张三”，“张三”等，你不会发现它们其实是同一个人。你应该在minumum有FIRST_NAME，middle_name，姓氏，personal_Suffix，然后你可以可能有一个计算方法为字段显示你想要显示的格式的完整名称。

Answer 4

我是新来的SQL，和新的StackOverflow，但不会这项工作？

选择的taskid，姓名FROM表GROUP BY的taskid