问题描述: 有表Table2,其结构及内容如下: Table2:id name1 name2 name3 ……(列有很多) 1 aa bb cc …… 2 ii jj kk …… 3 xx yy zz …… …………………………………………有表Table1,其结构如下: Table1: id variable现在想把Table2中的除id以外的字段名(注意,是字段名)填入Table1中的id, 从Table2中提取某一行(先假设是id为1的那一行吧)中与每个字段名对应的内容填入Table1的variable.以id为1的那行为例,就是要达到如下的效果: Table1: id variable name1 aa name2 bb name3 cc ………………. 我的解决方案:declare @vVariable varchar(2000),@var varchar(2000) --中間值的變量 declare @sql nvarchar(4000) -- 動態sql declare @insertSql varchar(4000) -- 插入臨時表的sql set @vVariable = ' ' if object_id('tempdb.dbo.#temp1') is not null drop table #temp1 select identity(int) id,name into #temp1 from syscolumns where id = object_id('Table2') and name <> 'id' order by colid if object_id('tempdb.dbo.#temp2') is null -- 創建臨時表#temp2 create table #temp2 ( id int identity, variable varchar(10) ) else truncate table #temp2select @vVariable = @vVariable + '+'',''+' + name from syscolumns where id = object_id('Table2') and name <> 'id' order by colid set @vVariable = right(@vVariable,len(@vVariable) - 6) set @sql = 'select @var = '+@vVariable+' from Table2 where id = 1' exec sp_executesql @sql,N'@var varchar(2000) output',@var output -- 組成以逗號分格的變量@varset @insertSql='insert into #temp2 values('''+REPLACE(@var,',',''') insert into #temp2 values(''')+''')' exec (@insertSql) -- 根據變量中的逗號分格插入臨時表insert into Table1(id,variable) select name,variable from #temp1,#temp2 where #temp1.id = #temp2.idselect * from Table1
按照Haiwer(海阔天空)的格式也寫好了. declare @vVariable varchar(2000),@var varchar(2000) --中間值的變量 declare @sql nvarchar(4000) -- 動態sql declare @insertSql varchar(4000) -- 插入臨時表的sql declare @alterSql varchar(100) -- 修改臨時表#temp1的sql declare @updateSql varchar(200) -- 更新臨時表#temp1的數據sql declare @i int,@count int -- Table2的紀錄數 select @count = count(1) from Table2; if @count = 0 begin print 'No row' return end if @count > 254 begin print 'Too many rows' return end set @vVariable = ' ' select @vVariable = @vVariable + '+'',''+' + name from syscolumns where id = object_id('Table2') and name <> 'id' order by colid set @vVariable = right(@vVariable,len(@vVariable) - 6)if object_id('tempdb.dbo.#temp1') is not null drop table #temp1 select identity(int) id,name into #temp1 from syscolumns where id = object_id('Table2') and name <> 'id' order by colid set @i = 1 while (@i <= @count) begin if object_id('tempdb.dbo.#temp2') is null -- 創建臨時表#temp2 create table #temp2 ( id int identity, variable varchar(10) ) else truncate table #temp2 set @sql = 'select @var = '+@vVariable+' from Table2 where id = ' + convert(varchar(3),@i) exec sp_executesql @sql,N'@var varchar(2000) output',@var output -- 組成以逗號分格的變量@var set @insertSql='insert into #temp2 values('''+REPLACE(@var,',',''') insert into #temp2 values(''')+''')' exec (@insertSql) -- 根據變量中的逗號分格插入臨時表
set @updateSql = 'update #temp1 set var' + convert(varchar(3),@i) + ' = variable from #temp2 ' +'where #temp1.id = #temp2.id' exec (@updateSql) -- 更新臨時表的數據
set @i = @i + 1 end alter table #temp1 drop column id select * from #temp1
转贴create proc up_transpose_table (@tablename nvarchar(256)) as begin set nocount on declare @col nvarchar(256) declare @makesql nvarchar(4000) declare @insertsql nvarchar(4000) declare @caculatesql nvarchar(400) declare @count int declare @i int create table #tmp (colname nvarchar(20)) select @caculatesql = 'select @count=count(1) from ' + @tablename exec sp_executesql @caculatesql, N'@count int output',@count output if @count >=1024 begin raiserror('too many rows, could not be transposed!',16,1) end else begin select @i=0 while @count >0 begin select @i=@i+1 select @makesql = 'alter table #tmp add col'+convert(varchar(20),@i)+' int' exec(@makesql) select @count=@count-1 end declare my_cursor cursor for select name from syscolumns where id=object_id(@tablename) order by colid open my_cursor fetch next from my_cursor into @col while @@fetch_status = 0 begin select @makesql ='select @insertsql= @insertsql + convert(varchar(4),'+@col+') +'','' from ' +@tablename select @insertsql =N'insert #tmp values ('''+@col+ ''',' execute sp_executesql @makesql,N'@insertsql nvarchar(4000) output' ,@insertsql output select @insertsql = left(@insertsql,len(@insertsql)-1) +')' exec(@insertsql) fetch next from my_cursor into @col end close my_cursor deallocate my_cursor select * from #tmp set nocount off end end
create table #t1 (f1 int,f2 varchar(100),f3 varchar(100),f4 varchar(100)) select *, identity(int,1,1) as tid into #t from table1 declare @colname varchar(300) declare @colid int set @colid = 0 while exists (select * from syscolumns A left join sysobjects B on A.id = B.id where B.name = 'table1' and A.colid > @colid) begin select top 1 @colname = A.name, @colid = A.colid from syscolumns A left join sysobjects B on A.id = B.id where B.name = 'table1' and A.colid > @colid exec ("insert #t1 select tid, '"+@colname+"', cast("+@colname+" as varchar) ,null from #t") endselect * from #t1 order by f1
create table table1(aa int, b int, c int, d int, e int,f int, g int) insert into table1 values(111, 2, 3, 4, 5, 6, 7 ) insert into table1 values(7, 6 , 3 , 4 , 5 ,6 , 7 )create table table2 (f1 int,f2 varchar(20),f3 int,f4 int)declare @sql varchar(8000) select identity(int,1,1) row,* into #temp from table1 declare xcursor cursor for select name from syscolumns where id=object_id('table1') declare @name varchar(20) open xcursor fetch xcursor into @namewhile @@fetch_status=0 begin set @sql= 'insert into table2(f1,f2,f3) select a.row,'''+ @name + ''',a.'+@name+' from #temp a,syscolumns b where b.id=object_id(''table1'') and b.name='''+@name+'''' exec (@sql) --select @name fetch xcursor into @name end close xcursor deallocate xcursor select * from table2 order by f1 drop table #temp drop table table1,table2
declare @sql varchar(8000) select identity(int,1,1) row,* into #temp from table1 declare xcursor cursor for select name from syscolumns where id=object_id('table1') declare @name varchar(20) open xcursor fetch xcursor into @name while @@fetch_status=0 begin set @sql= 'insert into table2(f1,f2,f3) select a.row,'''+ @name + ''',a.'+@name+' from #temp a,syscolumns b where b.id=object_id(''table1'') and b.name='''+@name+'''' exec (@sql) fetch xcursor into @name end close xcursor deallocate xcursor drop table #temp
作 者： zhuzhichao (竹之草)
等 级：
信 誉 值： 100
所属论坛： MS-SQL Server 基础类
问题点数： 300
回复次数： 60
发表时间： 2002-1-30 10:03:24
问题描述:
有表Table2,其结构及内容如下:
Table2:id name1 name2 name3 ……(列有很多)
1 aa bb cc ……
2 ii jj kk ……
3 xx yy zz ……
…………………………………………有表Table1,其结构如下:
Table1:
id variable现在想把Table2中的除id以外的字段名(注意,是字段名)填入Table1中的id,
从Table2中提取某一行(先假设是id为1的那一行吧)中与每个字段名对应的内容填入Table1的variable.以id为1的那行为例,就是要达到如下的效果:
Table1:
id variable
name1 aa
name2 bb
name3 cc
……………….
我的解决方案:declare @vVariable varchar(2000),@var varchar(2000) --中間值的變量
declare @sql nvarchar(4000) -- 動態sql
declare @insertSql varchar(4000) -- 插入臨時表的sql
set @vVariable = ' '
if object_id('tempdb.dbo.#temp1') is not null
drop table #temp1
select identity(int) id,name into #temp1 from syscolumns where id = object_id('Table2') and name <> 'id' order by colid if object_id('tempdb.dbo.#temp2') is null -- 創建臨時表#temp2
create table #temp2
(
id int identity,
variable varchar(10)
)
else
truncate table #temp2select @vVariable = @vVariable + '+'',''+' + name from syscolumns where id =
object_id('Table2') and name <> 'id' order by colid
set @vVariable = right(@vVariable,len(@vVariable) - 6)
set @sql = 'select @var = '+@vVariable+' from Table2 where id = 1'
exec sp_executesql @sql,N'@var varchar(2000) output',@var output -- 組成以逗號分格的變量@varset @insertSql='insert into #temp2 values('''+REPLACE(@var,',',''')
insert into #temp2 values(''')+''')'
exec (@insertSql) -- 根據變量中的逗號分格插入臨時表insert into Table1(id,variable)
select name,variable from #temp1,#temp2
where #temp1.id = #temp2.idselect * from Table1
回复人： kakua(青松客) ( ) 信誉：100 2002-1-30 10:19:35 得分:6
很好
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回复人： kakua(青松客) ( ) 信誉：100 2002-1-30 10:26:27 得分:6
很好
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回复人： LiaoCheng(光辉岁月) ( ) 信誉：100 2002-1-30 10:32:28 得分:6
收藏!!!
如果反过来又怎么实现呢 .....思考中.....
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回复人： kakua(青松客) ( ) 信誉：100 2002-1-30 10:32:40 得分:6
这里也太慢了，可否将论坛改一种格式，加快速度，不然老半天也出不来。
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回复人： progame(这个年轻人虽然资历低，但是...) ( ) 信誉：100 2002-1-30 10:39:18 得分:6
竹兄：就是利用你出的趣味SQL问题上的方法可以实现而且
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回复人： progame(这个年轻人虽然资历低，但是...) ( ) 信誉：100 2002-1-30 10:40:00 得分:6
竹兄：就是利用你出的趣味SQL问题上的方法可以实现而且你用的也是这个方法：）
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回复人： zhuzhichao(竹之草) ( ) 信誉：100 2002-1-30 10:55:09 得分:0
不錯,這里也用到了那樣的技巧.
不過,這段程序的技巧更多.
如能將每個步驟搞清的話,將對你很有幫助.LiaoCheng(Flower_梦里看花!!):
如果要反過來,請看
http://www.itpub.net/showthread.php?s=&threadid=11308
有很詳細的說明.
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回复人： net_steven(吃素的狼（平平淡淡）) ( ) 信誉：100 2002-1-30 11:00:38 得分:6
生成pivot table的问题，论坛里总有人问。
竹兄这个是地道的解决办法，谢了，收藏。不过建议针对所有记录应该再
把循环处理的语句加进去，再写一个由table1生成table2的过程（改用table变量写吧，大家多一点学习内容）。这样如再有类似提问，用此贴就可以解决了。
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回复人： net_steven(吃素的狼（平平淡淡）) ( ) 信誉：100 2002-1-30 11:08:00 得分:6
生成pivot table的问题，论坛里总有人问。
竹兄这个是地道的解决办法，谢了，收藏。不过建议针对所有记录应该再
把循环处理的语句加进去，再写一个由table1生成table2的过程（改用table变量写吧，大家多一点学习内容）。这样如再有类似提问，用此贴就可以解决了。
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回复人： Haiwer(海阔天空) ( ) 信誉：100 2002-1-30 14:13:42 得分:6
斑竹，干脆把如下格式的也写了：Table1:
id var1 var2 var3 ..... (这里的1，2，3.....是ID的值)
name1 aa ii xx ……
name2 bb jj yy ……
name3 cc kk zz ……
……………….
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回复人： zhuzhichao(竹之草) ( ) 信誉：100 2002-1-30 14:50:16 得分:0
to Haiwer(海阔天空):好,马上就写.
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回复人： zhuzhichao(竹之草) ( ) 信誉：100 2002-1-30 15:13:39 得分:0
按照Haiwer(海阔天空)的格式也寫好了.
declare @vVariable varchar(2000),@var varchar(2000) --中間值的變量
declare @sql nvarchar(4000) -- 動態sql
declare @insertSql varchar(4000) -- 插入臨時表的sql
declare @alterSql varchar(100) -- 修改臨時表#temp1的sql
declare @updateSql varchar(200) -- 更新臨時表#temp1的數據sql
declare @i int,@count int -- Table2的紀錄數
select @count = count(1) from Table2;
if @count = 0
begin
print 'No row'
return
end
if @count > 254
begin
print 'Too many rows'
return
end
set @vVariable = ' '
select @vVariable = @vVariable + '+'',''+' + name from syscolumns where id =
object_id('Table2') and name <> 'id' order by colid
set @vVariable = right(@vVariable,len(@vVariable) - 6)if object_id('tempdb.dbo.#temp1') is not null
drop table #temp1
select identity(int) id,name into #temp1 from syscolumns where id = object_id('Table2') and name <> 'id' order by colid set @i = 1
while (@i <= @count)
begin
if object_id('tempdb.dbo.#temp2') is null -- 創建臨時表#temp2
create table #temp2
(
id int identity,
variable varchar(10)
)
else
truncate table #temp2 set @sql = 'select @var = '+@vVariable+' from Table2 where id = ' + convert(varchar(3),@i)
exec sp_executesql @sql,N'@var varchar(2000) output',@var output -- 組成以逗號分格的變量@var set @insertSql='insert into #temp2 values('''+REPLACE(@var,',',''')
insert into #temp2 values(''')+''')'
exec (@insertSql) -- 根據變量中的逗號分格插入臨時表
set @alterSql = 'alter table #temp1 add var' + convert(varchar(3),@i) + ' varchar(10)'
exec (@alterSql) -- 增加臨時表的字段
set @updateSql = 'update #temp1 set var' + convert(varchar(3),@i) + ' = variable from #temp2 '
+'where #temp1.id = #temp2.id'
exec (@updateSql) -- 更新臨時表的數據
set @i = @i + 1
end
alter table #temp1 drop column id
select * from #temp1
as
begin
set nocount on
declare @col nvarchar(256)
declare @makesql nvarchar(4000)
declare @insertsql nvarchar(4000)
declare @caculatesql nvarchar(400)
declare @count int
declare @i int
create table #tmp (colname nvarchar(20))
select @caculatesql = 'select @count=count(1) from ' + @tablename
exec sp_executesql @caculatesql, N'@count int output',@count output
if @count >=1024
begin
raiserror('too many rows, could not be transposed!',16,1)
end
else
begin
select @i=0
while @count >0
begin
select @i=@i+1
select @makesql = 'alter table #tmp add col'+convert(varchar(20),@i)+' int'
exec(@makesql)
select @count=@count-1
end
declare my_cursor cursor for
select name from syscolumns where id=object_id(@tablename) order by colid
open my_cursor
fetch next from my_cursor into @col
while @@fetch_status = 0
begin
select @makesql ='select @insertsql= @insertsql + convert(varchar(4),'+@col+') +'','' from ' +@tablename
select @insertsql =N'insert #tmp values ('''+@col+ ''','
execute sp_executesql @makesql,N'@insertsql nvarchar(4000) output' ,@insertsql output
select @insertsql = left(@insertsql,len(@insertsql)-1) +')'
exec(@insertsql)
fetch next from my_cursor into @col
end
close my_cursor
deallocate my_cursor
select * from #tmp
set nocount off
end
end
select *, identity(int,1,1) as tid into #t from table1
declare @colname varchar(300)
declare @colid int
set @colid = 0
while exists (select * from syscolumns A left join sysobjects B on A.id = B.id
where B.name = 'table1' and A.colid > @colid)
begin
select top 1 @colname = A.name, @colid = A.colid from syscolumns A left join
sysobjects B on A.id = B.id where B.name = 'table1' and A.colid > @colid
exec ("insert #t1 select tid, '"+@colname+"', cast("+@colname+" as varchar) ,null from #t")
endselect * from #t1 order by f1
insert into table1 values(111, 2, 3, 4, 5, 6, 7 )
insert into table1 values(7, 6 , 3 , 4 , 5 ,6 , 7 )create table table2 (f1 int,f2 varchar(20),f3 int,f4 int)declare @sql varchar(8000)
select identity(int,1,1) row,* into #temp from table1
declare xcursor cursor for select name from syscolumns where id=object_id('table1')
declare @name varchar(20)
open xcursor
fetch xcursor into @namewhile @@fetch_status=0
begin
set @sql= 'insert into table2(f1,f2,f3) select a.row,'''+ @name + ''',a.'+@name+' from #temp a,syscolumns b where b.id=object_id(''table1'') and b.name='''+@name+''''
exec (@sql)
--select @name
fetch xcursor into @name
end
close xcursor
deallocate xcursor
select * from table2 order by f1
drop table #temp
drop table table1,table2
select identity(int,1,1) row,* into #temp from table1
declare xcursor cursor for select name from syscolumns where id=object_id('table1')
declare @name varchar(20)
open xcursor
fetch xcursor into @name
while @@fetch_status=0
begin
set @sql= 'insert into table2(f1,f2,f3) select a.row,'''+ @name + ''',a.'+@name+' from #temp a,syscolumns b where b.id=object_id(''table1'') and b.name='''+@name+''''
exec (@sql)
fetch xcursor into @name
end
close xcursor
deallocate xcursor
drop table #temp