【IT168技术文档】

　　我们来看一段导出SQL Server表到DBF文件的存储过程代码，希望对有的朋友能起到抛砖引玉的作用。

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