sql导出dbf文件存储过程

CREATE proc p_exporttb
@tbname sysname, --要导出的表名
@cols nvarchar(1000)=null, --要导出的表的列名字符串，格式：'col1,col2,col3',如果没有给出值，则认为是所有字段
@path nvarchar(1000), --文件存放目录
@fname nvarchar(250)='', --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
SET NOCOUNT ON
declare @err int,@src nvarchar(255),@desc nvarchar(255),@out int
declare @obj int,@constr nvarchar(1000),@sql varchar(8000),@fdlist varchar(8000)

--参数检测
if @fname is null or ltrim(rtrim(@fname))='' set @fname=@tbname+'.dbf'

--检查文件是否已经存在
if right(@path,1)<>'/' set @path=@path+'/'
create table #tb(a bit,b bit,c bit)
set @sql=@path+@fname
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
--删除临时表
drop table #tb
--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=NO;DATABASE='+@path+'"'

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

exec @err=sp_oamethod @obj,'open',null,@constr
if @err<>0 goto lberr

--创建表的SQL
select @sql='',@fdlist=''
--如下判断@cols是否有值，如果没有值则认为是全部的列
if @cols is null or rtrim(ltrim(@cols))=''
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
else
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 and CHARINDEX(a.name,@cols)<>0

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

set @sql='openrowset(''MICROSOFT.JET.OLEDB.4.0'',''dBase 5.0;DATABASE='
+@path+''',''select * from ['+@fname+']'')'

--导入数据
exec('insert into '+@sql+'('+@fdlist+') select '+@fdlist+' from '+@tbname)

return

lberr:
exec sp_oageterrorinfo 0,@src out,@desc out
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

SET NOCOUNT Off
GO