矩阵
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3:
将结果矩阵转置。
http://expert.csdn.net/Expert/topic/2390/2390314.xml?temp=.4681055
老衲:
if exists (select * from sysobjects where id = object_id('proc_sky_blue') and xtype ='P')
drop proc proc_sky_blue
go
create proc proc_sky_blue (@tablename varchar(200))
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('表的行数太多了,我转不了',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
go
----------------分析
declare @tablename varchar(200)
set @tablename='table1'
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('表的行数太多了,我转不了',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) +')'
select @insertsql
--exec(@insertsql)
fetch next from my_cursor into @col
end
close my_cursor
deallocate my_cursor
select * from #tmp
set nocount off
drop table #tmp
end
end
将结果矩阵转置。
http://expert.csdn.net/Expert/topic/2390/2390314.xml?temp=.4681055
老衲:
if exists (select * from sysobjects where id = object_id('proc_sky_blue') and xtype ='P')
drop proc proc_sky_blue
go
create proc proc_sky_blue (@tablename varchar(200))
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('表的行数太多了,我转不了',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
go
----------------分析
declare @tablename varchar(200)
set @tablename='table1'
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('表的行数太多了,我转不了',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) +')'
select @insertsql
--exec(@insertsql)
fetch next from my_cursor into @col
end
close my_cursor
deallocate my_cursor
select * from #tmp
set nocount off
drop table #tmp
end
end
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