SELECT CH.ClientHistoryID,ClientID,CH.ActionName,ActionTime,Re,ClientName,Owner FROM PE_ClientHistory CH INNER JOIN PE_ClientHistoryItem CHI ON CH.ClientHistoryID=CHI.ClientHistoryID INNER JOIN PE_ClientHistoryItem CHIE on CH.ClientHistoryID = CHIE.ClientHistoryID
参考这个:/* 标题:按某字段合并字符串之一(简单合并) 作者:爱新觉罗.毓华(十八年风雨,守得冰山雪莲花开) 时间:2008-11-06 地点:广东深圳描述:将如下形式的数据按id字段合并value字段。 id value ----- ------ 1 aa 1 bb 2 aaa 2 bbb 2 ccc 需要得到结果: id value ------ ----------- 1 aa,bb 2 aaa,bbb,ccc 即:group by id, 求 value 的和(字符串相加) */ --1、sql2000中只能用自定义的函数解决 create table tb(id int, value varchar(10)) insert into tb values(1, 'aa') insert into tb values(1, 'bb') insert into tb values(2, 'aaa') insert into tb values(2, 'bbb') insert into tb values(2, 'ccc') gocreate function dbo.f_str(@id int) returns varchar(100) as begin declare @str varchar(1000) set @str = '' select @str = @str + ',' + cast(value as varchar) from tb where id = @id set @str = right(@str , len(@str) - 1) return @str end go--调用函数 select id , value = dbo.f_str(id) from tb group by iddrop function dbo.f_str drop table tb --2、sql2005中的方法 create table tb(id int, value varchar(10)) insert into tb values(1, 'aa') insert into tb values(1, 'bb') insert into tb values(2, 'aaa') insert into tb values(2, 'bbb') insert into tb values(2, 'ccc') goselect id, [value] = stuff((select ',' + [value] from tb t where id = tb.id for xml path('')) , 1 , 1 , '') from tb group by iddrop table tb --3、使用游标合并数据 create table tb(id int, value varchar(10)) insert into tb values(1, 'aa') insert into tb values(1, 'bb') insert into tb values(2, 'aaa') insert into tb values(2, 'bbb') insert into tb values(2, 'ccc') go declare @t table(id int,value varchar(100))--定义结果集表变量 --定义游标并进行合并处理 declare my_cursor cursor local for select id , value from tb declare @id_old int , @id int , @value varchar(10) , @s varchar(100) open my_cursor fetch my_cursor into @id , @value select @id_old = @id , @s='' while @@FETCH_STATUS = 0 begin if @id = @id_old select @s = @s + ',' + cast(@value as varchar) else begin insert @t values(@id_old , stuff(@s,1,1,'')) select @s = ',' + cast(@value as varchar) , @id_old = @id end fetch my_cursor into @id , @value END insert @t values(@id_old , stuff(@s,1,1,'')) close my_cursor deallocate my_cursorselect * from @t drop table tb
JonasFeng可能理解错了,我的意思不是这样。。不过还是谢谢你
非常感谢dawugui 因为我们系统要兼顾2000和2005,所以选择了游标方法,我是这样写的: declare @t table( ClientHistoryID int, ClientId int, ActionName nvarchar(50), ActionTime datetime, UserIP nvarchar(50), UserName nvarchar(50), Re nvarchar(200), ClientName nvarchar(300), Owner nvarchar(300))declare my_cursor cursor local for SELECT CH.ClientHistoryID,ClientID,ActionName,ActionTime,UserIP,UserName,Re,FieldName,OldValue FROM PE_ClientHistory CH INNER JOIN PE_ClientHistoryItem CHI ON CH.ClientHistoryID=CHI.ClientHistoryID WHERE ActionName='合并客户' ORDER BY ClientHistoryIDdeclare @ClientHistoryID int, @ClientID int, @ActionName nvarchar(50), @ActionTime datetime, @UserIP nvarchar(50), @UserName nvarchar(50), @Re nvarchar(200), @FieldName nvarchar(100), @OldValue nvarchar(300), @TempID int, @OldValue_ClientName nvarchar(300), @OldValue_Owner nvarchar(300)open my_cursorfetch my_cursor into @ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@FieldName,@OldValue SELECT @TempID=@ClientHistoryID WHILE @@FETCH_STATUS = 0 BEGIN IF @ClientHistoryID=@TempID AND @FieldName='ClientName' SELECT @OldValue_ClientName=@OldValue IF @ClientHistoryID=@TempID AND @FieldName='Owner' BEGIN SELECT @OldValue_Owner=@OldValue INSERT INTO @t VALUES(@ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@OldValue_ClientName,@OldValue_Owner) END fetch my_cursor into @ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@FieldName,@OldValue SELECT @TempID=@ClientHistoryID ENDCLOSE my_cursor DEALLOCATE my_cursorSELECT * FROM @t
不好意思发个代码版的让大家好看点declare @t table( ClientHistoryID int, ClientId int, ActionName nvarchar(50), ActionTime datetime, UserIP nvarchar(50), UserName nvarchar(50), Re nvarchar(200), ClientName nvarchar(300), Owner nvarchar(300))declare my_cursor cursor local for SELECT CH.ClientHistoryID,ClientID,ActionName,ActionTime,UserIP,UserName,Re,FieldName,OldValue FROM PE_ClientHistory CH INNER JOIN PE_ClientHistoryItem CHI ON CH.ClientHistoryID=CHI.ClientHistoryID WHERE ActionName='合并客户' ORDER BY ClientHistoryIDdeclare @ClientHistoryID int, @ClientID int, @ActionName nvarchar(50), @ActionTime datetime, @UserIP nvarchar(50), @UserName nvarchar(50), @Re nvarchar(200), @FieldName nvarchar(100), @OldValue nvarchar(300), @TempID int, @OldValue_ClientName nvarchar(300), @OldValue_Owner nvarchar(300)open my_cursorfetch my_cursor into @ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@FieldName,@OldValue SELECT @TempID=@ClientHistoryID WHILE @@FETCH_STATUS = 0 BEGIN IF @ClientHistoryID=@TempID AND @FieldName='ClientName' SELECT @OldValue_ClientName=@OldValue IF @ClientHistoryID=@TempID AND @FieldName='Owner' BEGIN SELECT @OldValue_Owner=@OldValue INSERT INTO @t VALUES(@ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@OldValue_ClientName,@OldValue_Owner) END fetch my_cursor into @ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@FieldName,@OldValue SELECT @TempID=@ClientHistoryID ENDCLOSE my_cursor DEALLOCATE my_cursorSELECT * FROM @t
SELECT CH.ClientHistoryID,ClientID,CH.ActionName,ActionTime,Re,ClientName,Owner
FROM PE_ClientHistory CH INNER JOIN PE_ClientHistoryItem CHI
ON CH.ClientHistoryID=CHI.ClientHistoryID INNER JOIN PE_ClientHistoryItem CHIE
on CH.ClientHistoryID = CHIE.ClientHistoryID
标题:按某字段合并字符串之一(简单合并)
作者:爱新觉罗.毓华(十八年风雨,守得冰山雪莲花开)
时间:2008-11-06
地点:广东深圳描述:将如下形式的数据按id字段合并value字段。
id value
----- ------
1 aa
1 bb
2 aaa
2 bbb
2 ccc
需要得到结果:
id value
------ -----------
1 aa,bb
2 aaa,bbb,ccc
即:group by id, 求 value 的和(字符串相加)
*/
--1、sql2000中只能用自定义的函数解决
create table tb(id int, value varchar(10))
insert into tb values(1, 'aa')
insert into tb values(1, 'bb')
insert into tb values(2, 'aaa')
insert into tb values(2, 'bbb')
insert into tb values(2, 'ccc')
gocreate function dbo.f_str(@id int) returns varchar(100)
as
begin
declare @str varchar(1000)
set @str = ''
select @str = @str + ',' + cast(value as varchar) from tb where id = @id
set @str = right(@str , len(@str) - 1)
return @str
end
go--调用函数
select id , value = dbo.f_str(id) from tb group by iddrop function dbo.f_str
drop table tb
--2、sql2005中的方法
create table tb(id int, value varchar(10))
insert into tb values(1, 'aa')
insert into tb values(1, 'bb')
insert into tb values(2, 'aaa')
insert into tb values(2, 'bbb')
insert into tb values(2, 'ccc')
goselect id, [value] = stuff((select ',' + [value] from tb t where id = tb.id for xml path('')) , 1 , 1 , '')
from tb
group by iddrop table tb
--3、使用游标合并数据
create table tb(id int, value varchar(10))
insert into tb values(1, 'aa')
insert into tb values(1, 'bb')
insert into tb values(2, 'aaa')
insert into tb values(2, 'bbb')
insert into tb values(2, 'ccc')
go
declare @t table(id int,value varchar(100))--定义结果集表变量
--定义游标并进行合并处理
declare my_cursor cursor local for
select id , value from tb
declare @id_old int , @id int , @value varchar(10) , @s varchar(100)
open my_cursor
fetch my_cursor into @id , @value
select @id_old = @id , @s=''
while @@FETCH_STATUS = 0
begin
if @id = @id_old
select @s = @s + ',' + cast(@value as varchar)
else
begin
insert @t values(@id_old , stuff(@s,1,1,''))
select @s = ',' + cast(@value as varchar) , @id_old = @id
end
fetch my_cursor into @id , @value
END
insert @t values(@id_old , stuff(@s,1,1,''))
close my_cursor
deallocate my_cursorselect * from @t
drop table tb
declare @t table(
ClientHistoryID int,
ClientId int,
ActionName nvarchar(50),
ActionTime datetime,
UserIP nvarchar(50),
UserName nvarchar(50),
Re nvarchar(200),
ClientName nvarchar(300),
Owner nvarchar(300))declare my_cursor cursor local for
SELECT CH.ClientHistoryID,ClientID,ActionName,ActionTime,UserIP,UserName,Re,FieldName,OldValue
FROM PE_ClientHistory CH INNER JOIN PE_ClientHistoryItem CHI
ON CH.ClientHistoryID=CHI.ClientHistoryID
WHERE ActionName='合并客户'
ORDER BY ClientHistoryIDdeclare @ClientHistoryID int,
@ClientID int,
@ActionName nvarchar(50),
@ActionTime datetime,
@UserIP nvarchar(50),
@UserName nvarchar(50),
@Re nvarchar(200),
@FieldName nvarchar(100),
@OldValue nvarchar(300),
@TempID int,
@OldValue_ClientName nvarchar(300),
@OldValue_Owner nvarchar(300)open my_cursorfetch my_cursor into @ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@FieldName,@OldValue
SELECT @TempID=@ClientHistoryID
WHILE @@FETCH_STATUS = 0
BEGIN
IF @ClientHistoryID=@TempID AND @FieldName='ClientName'
SELECT @OldValue_ClientName=@OldValue
IF @ClientHistoryID=@TempID AND @FieldName='Owner'
BEGIN
SELECT @OldValue_Owner=@OldValue
INSERT INTO @t VALUES(@ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@OldValue_ClientName,@OldValue_Owner)
END
fetch my_cursor into @ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@FieldName,@OldValue
SELECT @TempID=@ClientHistoryID
ENDCLOSE my_cursor
DEALLOCATE my_cursorSELECT * FROM @t
ClientHistoryID int,
ClientId int,
ActionName nvarchar(50),
ActionTime datetime,
UserIP nvarchar(50),
UserName nvarchar(50),
Re nvarchar(200),
ClientName nvarchar(300),
Owner nvarchar(300))declare my_cursor cursor local for
SELECT CH.ClientHistoryID,ClientID,ActionName,ActionTime,UserIP,UserName,Re,FieldName,OldValue
FROM PE_ClientHistory CH INNER JOIN PE_ClientHistoryItem CHI
ON CH.ClientHistoryID=CHI.ClientHistoryID
WHERE ActionName='合并客户'
ORDER BY ClientHistoryIDdeclare @ClientHistoryID int,
@ClientID int,
@ActionName nvarchar(50),
@ActionTime datetime,
@UserIP nvarchar(50),
@UserName nvarchar(50),
@Re nvarchar(200),
@FieldName nvarchar(100),
@OldValue nvarchar(300),
@TempID int,
@OldValue_ClientName nvarchar(300),
@OldValue_Owner nvarchar(300)open my_cursorfetch my_cursor into @ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@FieldName,@OldValue
SELECT @TempID=@ClientHistoryID
WHILE @@FETCH_STATUS = 0
BEGIN
IF @ClientHistoryID=@TempID AND @FieldName='ClientName'
SELECT @OldValue_ClientName=@OldValue
IF @ClientHistoryID=@TempID AND @FieldName='Owner'
BEGIN
SELECT @OldValue_Owner=@OldValue
INSERT INTO @t VALUES(@ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@OldValue_ClientName,@OldValue_Owner)
END
fetch my_cursor into @ClientHistoryID,@ClientID,@ActionName,@ActionTime,@UserIP,@UserName,@Re,@FieldName,@OldValue
SELECT @TempID=@ClientHistoryID
ENDCLOSE my_cursor
DEALLOCATE my_cursorSELECT * FROM @t