CREATE proc exportToDBF
@tbname sysname,          --要导出的表名
@path nvarchar(1000),     --文件存放目录
@fname nvarchar(250)='',  --导出的文件名,默认为表名
@over bit=0               --是否覆盖已经存在的文件,如果不覆盖,则直接追加
as
declare @err int,@src nvarchar(255),@desc nvarchar(255),@out int
declare @obj int,@constr nvarchar(1000),@sql varchar(8000),@fdlist varchar(8000)
declare @lastsql varchar(255)

--参数检测
if isnull(@fname,'')='' set @fname=@tbname+'.dbf'

--文件路径和文件名
if right(@path,1)<>'\' set @path=@path+'\'
create table #tb(a bit,b bit,c bit)
set @sql=@path+@fname

--判断dbf文件是否存在，如果存在返回结果a=1,b=0,c=1
insert into #tb exec master..xp_fileexist @sql
if exists(select 1 from #tb where a=1)
 if @over=1
  begin
   set @sql='del '+@sql
   exec master..xp_cmdshell @sql,no_output
  end
 else
  set @over=0
else
 set @over=1

--数据库创建语句
set @sql=@path+@fname
set @constr='Provider=Microsoft.Jet.OLEDB.4.0;Extended Properties="dBASE 5.0;'+';HDR=yes;DATABASE='+@path+'"'

--连接数据库
exec @err=sp_oacreate 'adodb.connection',@obj out
if @err<>0 goto lberr

--打开数据库
exec @err=sp_oamethod @obj,'open',null,@constr
if @err<>0 goto lberr

select @sql='',@fdlist=''

select @fdlist=@fdlist+','+a.name,@sql=@sql+',['+a.name+'] '
           +case when b.name in('char','nchar','varchar','nvarchar') then
                              'text('+cast(case when a.length>250 then 250 else a.length end as varchar)+')'
              when b.name in('tynyint','int','bigint','tinyint') then 'int'
    when b.name in('smalldatetime','datetime') then 'datetime'
    when b.name in('money','smallmoney') then 'money'
    else b.name end
FROM syscolumns a left join systypes b on a.xtype=b.xusertype
where b.name not in('image','text','uniqueidentifier','sql_variant','ntext','varbinary','binary','timestamp')
and object_id(@tbname)=id

--建一个dbf表
select @sql='create table ['+@fname
+']('+substring(@sql,2,8000)+')'
,@fdlist=substring(@fdlist,2,8000)

if @over=1
 begin
  exec @err=sp_oamethod @obj,'execute',@out out,@sql
  if @err<>0 goto lberr
 end
exec @err=sp_oadestroy @obj

--导出数据到表中
set @sql="openrowset('MICROSOFT.JET.OLEDB.4.0','dBase 5.0;DATABASE="
        + @path+"','select * from ["+ @fname+"]')"

set @lastsql='insert into '+@sql+' select * from '+@tbname
exec(@lastsql)

--删除临时表
drop table #tb

return

--select * from heat

lberr:
exec sp_oageterrorinfo 0,@src out,@desc out
     -- raiserror ('asdfasdf',16,1)
lbexit:
select cast(@err as varbinary(4)) as 错误号
  ,@src as 错误源,@desc as 错误描述
select @sql,@constr,@fdlist

GO

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