create table t1(code varchar(10))
insert into t1 select 'aaa'
insert into t1 select 'bbb'
create table t2(code varchar(10))
insert into t2 select 'bbb'
go
go
create procedure [dbo].[p_CopyData]
@SrcTableName nvarchar(50),
@DestTableName nvarchar(50)
as
begin
declare @num int,@i int
exec('insert into #t_code select '+@DestTableName+'.code from '+@SrcTableName+' join '+@DestTableName+'
on '+@SrcTableName+'.code='+@DestTableName+'.code')
end
go
create table #t_code(code varchar(10))
exec p_copyData 't1','t2'
select * from #t_code
/*
code
----------
bbb

(1 行受影响)
*/
go
drop table t1,t2,#t_code
drop procedure p_copydata

------解决方案--------------------
存储过程内部定义的临时表的作用域只是当前这个存储过程中，临时表将在退出其作用域时由系统自动删除

------解决方案--------------------
#t_code--改为 ##t_code 全局临时表也可接收
建议
用临时表或表变量接收