--生成測試資料
create
table t(department int,person varchar(20))
insert
into t select
1,'張三'
insert
into t select
1,'李四'
insert
into t select
1,'王五'
insert
into t select
2,'趙六'
insert
into t select
2,'鄧七'
insert
into t select
2,'劉八'
insert
into t select
2,'劉九'
insert
into t select
3,'劉十'
insert
into t select
3,'周十一'
go select * from t
--1.使用者定義函式
create
function f_str ( @department int )
returns varchar(8000)
asbegin
declare @ret varchar(8000)
set @ret = ''
select @ret = @ret + ',' + person
from t
where department = @department
set @ret = stuff(@ret, 1, 1, '')
return @ret
endgo
--執行
select distinct
department ,
person = dbo.f_str(department)
from t
go /*
department
person
1張三,李四,王五
2趙六,鄧七,劉八
*/--2.xml for path
select b.department ,
left(nt, len(nt) - 1) as paths
from ( select department ,
( select person + ','
from t
where department = a.department
order
by department
forxml path('')
) as nt
from t a
group
by department
) b
/* department
paths
1張三,李四,王五
2趙六,鄧七,劉八
*/--改一下上面的寫法
select department ,
person = stuff(( select ',' + person
from t t
where department = nt.department
forxml path('')
), 1, 1, '')
from t nt
group
by department
------------------------------------
--3.cte
; with result
as ( select department ,
person ,
row = row_number() over ( partition by department order
by department )
from t
), result2
as ( select department ,
cast(person as nvarchar(100)) person ,
row
from result
where row = 1
union all
select a.department ,
cast(b.person + ',' + a.person as nvarchar(100)) ,
a.row
from result a
join result2 b on a.department = b.department
and a.row = b.row + 1
) select department ,
person
from result2 a
where row = ( select
max(row)
from result
where department = a.department
) order
by department
option ( maxrecursion 0 )
-------------------------------
--刪除測試資料
drop
function f_str
drop
table t
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