分享一下SQL Server执行动态SQL的正确方式

declare @sql nvarchar(800),@dd varchar(20)
set @sql='set @mm=''测试字符串'''
exec sp_executesql @sql,N'@mm varchar(20) output',@dd output
select @dd 

create proc proc_InToServer @收费站点编号 varchar(4),@车道号 tinyint,@进入时间 varchar(23),@UID char(16),
@车牌 varchar(12),@车型 char(1),@识别车牌号 varchar(12),@识别车型 char(1),@收费金额 money,@交易状态 char(1),
@有图像 bit,@离开时间 varchar(23),@速度 float,@HasInsert int output
as
begin
  declare @inTime datetime,@TableName varchar(255),@leaveTime datetime,@HasTable bit,@Sql nvarchar(4000)
 select @intime=Convert(datetime,@进入时间),@leaveTime=Convert(datetime,@离开时间)
 set @TableName='ETC03_01_OBE原始过车记录表_'+dbo.formatDatetime(@intime,'YYYYMMDD')

 select @HasTable=(Case when Count(*)>0 then 1 else 0 end) from sysobjects where id=Object_id(@TableName) and ObjectProperty(id,'IsUserTable')=1
 if @HasTable=0
 begin
  set @Sql='CREATE TABLE [dbo].['+@TableName+'] (
 [收费站点编号] [char] (4) COLLATE Chinese_PRC_CI_AS NOT NULL,
 [车道号] [tinyint] NOT NULL,
 [进入时间] [datetime] NOT NULL,
 [UID] [char] (16) COLLATE Chinese_PRC_CI_AS NOT NULL,
 [车牌] [varchar] (12) COLLATE Chinese_PRC_CI_AS NULL ,
 [车型] [char] (1) COLLATE Chinese_PRC_CI_AS NULL ,
 [识别车牌号] [varchar] (12) COLLATE Chinese_PRC_CI_AS NULL ,
 [识别车型] [char] (1) COLLATE Chinese_PRC_CI_AS NULL ,
 [收费金额] [money] NULL ,
 [交易状态] [char] (1) COLLATE Chinese_PRC_CI_AS NULL ,
 [有图像] [bit] NOT NULL ,
 [离开时间] [datetime] NULL ,
 [速度] [float] NULL,
    Constraint'+' PK_'+@TableName+' primary key(收费站点编号,车道号,进入时间,UID)
    ) ON [PRIMARY]'
   Execute(@Sql)
  end 
  set @sql = 'select @Cnt=count(*) from '+@TableName+ ' where 收费站点编号='''+@收费站点编号+''' and 车道号='+cast(@车道号 as varchar(4))+' and 进入时间='''+@进入时间+''' and UID='''+@UID+''''
  set @sql = @sql + ' if @Cnt=0 '
  
  set @sql=@sql+'insert '+@TableName+' values('''+@收费站点编号+''','+cast(@车道号 as varchar(4))+','''+@进入时间+''','''+@Uid+''','''+@车牌+  
  ''','''+@车型+''','''+  @识别车牌号+''','''+@识别车型+''','+Cast(@收费金额 as varchar(8))+','''+@交易状态+''','+cast(@有图像 as varchar(1))+
  ','''+@离开时间+''','+Cast(@速度 as varchar(8))+')'
  --Execute(@sql) 
  exec sp_executesql @sql,N'@Cnt int output',@HasInsert output
end

declare @name nvarchar(100)

declare @sql nvarchar(200)

declare @i int
set @i =10000

while @i<=99999
begin
	set @name = 'test' + cast(@i as varchar(20))
	set @sql =N'SELECT * INTO '+ @name +' FROM test'
	exec sp_executesql @sql
	print @name

 set @i=@i + 1
end