Sql server 2008 如何在sql server中更新以逗号分隔的多行列

这是两张桌子

table stud
id   name  marks1 marks 2
1     X     3      2
2     y     4      2
3     z     5      2

第二表评论

comment

 comment
 1,X,3,2#2,y,4,2#3,z,5,2

使用给定格式的螺柱行更新注释列 预期结果

表注释

comment

 comment
 1,X,3,2#2,y,4,2#3,z,5,2

MS SQL Server 2008架构设置：

create table stud
(
  id int,
  name varchar(10),
  marks1 int,
  marks2 int
)

create table comment
(
  comment varchar(max)
)

insert into stud values
(1,     'X',     3,      2),
(2,     'y',     4,      2),
(3,     'z',     5,      2)

insert into comment(comment)
select
  (
  select '#'+cast(id as varchar(10))+','+
             name+','+
             cast(marks1 as varchar(10))+','+
             cast(marks2 as varchar(10))
  from stud
  for xml path(''), type
  ).value('substring((./text())[1], 2)', 'varchar(max)')

select *
from comment

|                 COMMENT |
---------------------------
| 1,X,3,2#2,y,4,2#3,z,5,2 |

查询1：

create table stud
(
  id int,
  name varchar(10),
  marks1 int,
  marks2 int
)

create table comment
(
  comment varchar(max)
)

insert into stud values
(1,     'X',     3,      2),
(2,     'y',     4,      2),
(3,     'z',     5,      2)

insert into comment(comment)
select
  (
  select '#'+cast(id as varchar(10))+','+
             name+','+
             cast(marks1 as varchar(10))+','+
             cast(marks2 as varchar(10))
  from stud
  for xml path(''), type
  ).value('substring((./text())[1], 2)', 'varchar(max)')

select *
from comment

|                 COMMENT |
---------------------------
| 1,X,3,2#2,y,4,2#3,z,5,2 |

：

create table stud
(
  id int,
  name varchar(10),
  marks1 int,
  marks2 int
)

create table comment
(
  comment varchar(max)
)

insert into stud values
(1,     'X',     3,      2),
(2,     'y',     4,      2),
(3,     'z',     5,      2)

insert into comment(comment)
select
  (
  select '#'+cast(id as varchar(10))+','+
             name+','+
             cast(marks1 as varchar(10))+','+
             cast(marks2 as varchar(10))
  from stud
  for xml path(''), type
  ).value('substring((./text())[1], 2)', 'varchar(max)')

select *
from comment

|                 COMMENT |
---------------------------
| 1,X,3,2#2,y,4,2#3,z,5,2 |

查询2：

create table stud
(
  id int,
  name varchar(10),
  marks1 int,
  marks2 int
)

create table comment
(
  comment varchar(max)
)

insert into stud values
(1,     'X',     3,      2),
(2,     'y',     4,      2),
(3,     'z',     5,      2)

insert into comment(comment)
select
  (
  select '#'+cast(id as varchar(10))+','+
             name+','+
             cast(marks1 as varchar(10))+','+
             cast(marks2 as varchar(10))
  from stud
  for xml path(''), type
  ).value('substring((./text())[1], 2)', 'varchar(max)')

select *
from comment

|                 COMMENT |
---------------------------
| 1,X,3,2#2,y,4,2#3,z,5,2 |

：

create table stud
(
  id int,
  name varchar(10),
  marks1 int,
  marks2 int
)

create table comment
(
  comment varchar(max)
)

insert into stud values
(1,     'X',     3,      2),
(2,     'y',     4,      2),
(3,     'z',     5,      2)

insert into comment(comment)
select
  (
  select '#'+cast(id as varchar(10))+','+
             name+','+
             cast(marks1 as varchar(10))+','+
             cast(marks2 as varchar(10))
  from stud
  for xml path(''), type
  ).value('substring((./text())[1], 2)', 'varchar(max)')

select *
from comment

|                 COMMENT |
---------------------------
| 1,X,3,2#2,y,4,2#3,z,5,2 |

你自己做过什么努力吗？如果是这样，请公布你所拥有的，以及为什么/如何出错。