通过表名 查询所有存在这个表的数据库

通过表名  查询所有存在这个表的数据库 

  declare @tbname sysname
  set @tbname='tb'
  declare @dbname sysname,@sql nvarchar(4000),@re bit,@sql1 varchar(8000)
  set @sql1=''
  declare tb cursor for select name from master..sysdatabases
  open tb 
   fetch next from tb into @dbname
  while @@fetch_status=0
  begin
  set @sql='set @re=case when exists(select 1 from ['
  +@dbname+']..sysobjects where xtype=''U'' and name='''
  +@tbname+''') then 1 else 0 end'
  exec sp_executesql @sql,N'@re bit out',@re out
  if @re=1 set @sql1=@sql1+' union all select '''+@dbname+''''
  fetch next from tb into @dbname
  end
  close tb
  deallocate tb
  set @sql1=substring(@sql1,12,8000)
      exec(@sql1)