将表中数据生成SQL语句

CREATE PROCEDURE dbo.UspOutputData 
 @tablename sysname 
 AS 
 declare @column varchar(1000) 
 declare @columndata varchar(1000) 
 declare @sql varchar(4000) 
 declare @xtype tinyint 
 declare @name sysname 
 declare @objectId int 
 declare @objectname sysname 
 declare @ident int 
 
 set nocount on 
 set @objectId=object_id(@tablename) 
 
 if @objectId is null -- 判斷對象是否存在 
 begin 
 print 'The object not exists' 
 return 
 end 
 set @objectname=rtrim(object_name(@objectId)) 
 
 if @objectname is null or charindex(@objectname,@tablename)=0 --此判断不严密 
 begin 
 print 'object not in current database' 
 return 
 end 
 
 if OBJECTPROPERTY(@objectId,'IsTable') < > 1 -- 判斷對象是否是table 
 begin 
 print 'The object is not table' 
 return 
 end 
 
 select @ident=status&0x80 from syscolumns where id=@objectid and status&0x80=0x80 
 
 if @ident is not null 
 print 'SET IDENTITY_INSERT '+@TableName+' ON' 
 
 declare syscolumns_cursor cursor
 
 for select c.name,c.xtype from syscolumns c where c.id=@objectid order by c.colid 
 
 open syscolumns_cursor 
 set @column='' 
 set @columndata='' 
 fetch next from syscolumns_cursor into @name,@xtype 
 
 while @@fetch_status < >-1 
 begin 
 if @@fetch_status < >-2 
 begin 
 if @xtype not in(189,34,35,99,98) --timestamp不需处理，image,text,ntext,sql_variant 暂时不处理 
 
 begin 
 set @column=@column+case when len(@column)=0 then'' else ','end+@name 
 
 set @columndata=@columndata+case when len(@columndata)=0 then '' else ','','','
 end 
 
 +case when @xtype in(167,175) then '''''''''+'+@name+'+''''''''' --varchar,char 
 when @xtype in(231,239) then '''N''''''+'+@name+'+''''''''' --nvarchar,nchar 
 when @xtype=61 then '''''''''+convert(char(23),'+@name+',121)+''''''''' --datetime 
 when @xtype=58 then '''''''''+convert(char(16),'+@name+',120)+''''''''' --smalldatetime 
 when @xtype=36 then '''''''''+convert(char(36),'+@name+')+''''''''' --uniqueidentifier 
 else @name end 
 
 end 
 
 end 
 
 fetch next from syscolumns_cursor into @name,@xtype 
 
 end 
 
 close syscolumns_cursor 
 deallocate syscolumns_cursor 
 
 set @sql='set nocount on select ''insert '+@tablename+'('+@column+') values(''as ''--'','+@columndata+','')'' from '+@tablename 
 
 print '--'+@sql 
 exec(@sql) 
 
 if @ident is not null 
 print 'SET IDENTITY_INSERT '+@TableName+' OFF' 
 
 GO
 
 exec UspOutputData  tableName[表名]