varchar转nvarchar

gistfile1.sql

if   exists   (select   *   from   dbo.sysobjects   where   id   =   object_id(N'[dbo].[p_set]')   and   OBJECTPROPERTY(id,   N'IsProcedure')   =   1)   
  drop   procedure   [dbo].[p_set]   
  GO   
    
  /*--将所有的表中,数值类型由char,varchar改为nchar,nvarchar       
    
  --*/   
    
  /*--调用示例:   
  exec   p_set   
  --*/   
  --修改的存储过程   
  create   procedure   p_set   
  as   
  declare   tb   cursor   for   
  SELECT   sql='alter   table   ['+d.name   
  +']   alter   column   ['+a.name+']   n'   
  +b.name+'('+cast(a.length*2   as   varchar)+')'   
  FROM   syscolumns   a   
  left   join   systypes   b   on   a.xtype=b.xusertype   
  inner   join   sysobjects   d   on   a.id=d.id     and   d.xtype='U'   and     d.name<>'dtproperties'   
  where     
  b.name   in('char','varchar')   
  and     
  not   exists(SELECT   1   FROM   sysobjects   where   xtype='PK'   and   name   in   (   
  SELECT   name   FROM   sysindexes   WHERE   indid   in(   
  SELECT   indid   FROM   sysindexkeys   WHERE   id   =   a.id   AND   colid=a.colid   
  ))) --主键不能修改   
  order   by   d.name,a.name   
    
  declare   @sql   varchar(1000)   
  open   tb   
  fetch   next   from   tb   into   @sql   
  while   @@fetch_status   =   0   
  begin   
  exec(@sql)   
  fetch   next   from   tb   into   @sql   
  end   
  close   tb   
  deallocate   tb   
  go