导入/导出dBase数据库教程 -电脑资料
从dBase文件中,导入数据到SQL数据库中,很简单,直接用下面的语句:
/*===================================================================*/
--如果接受数据导入的表已经存在
insert into 表 select * from
openrowset('MICROSOFT.JET.OLEDB.4.0'
,'dBase 5.0;DATABASE=c:\','select * from [test.dbf]')
--如果导入数据并生成表
select * into 表 from
openrowset('MICROSOFT.JET.OLEDB.4.0'
,'dBase 5.0;DATABASE=c:\','select * from [test.dbf]')
/*===================================================================*/
--如果从SQL数据库中,导出数据到dBase,如果dBase文件已经存在,就可以简单的用:
insert into
openrowset('MICROSOFT.JET.OLEDB.4.0'
,'dBase 5.0;DATABASE=c:\','select * from [test.dbf]')
select * from 表
/*--说明:
DATABASE=c:\c:\是dbf文件的存放目录
'select * from [test.dbf]test.dbf是指dbf文件名
--*/
--如果dBase文件不存在,就需要用到下面的存储过程了.
/*--数据导出dBase
导出表中的数据到dBase,如果文件不存在,将自动创建文件
基于通用性考虑,仅支持导出标准数据类型
--*/
/*--调用示例
--导出dBase
p_exporttb @tbname='地区资料',@path='c:\',@over=0
--*/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[p_exporttb]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[p_exporttb]
GO
create proc p_exporttb
@tbname sysname,--要导出的表名
@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
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 isnull(@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
--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=''
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
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
go
/*--数据导出dBase
导出查询语句中的数据到dBase,如果文件不存在,将自动创建文件
基于通用性考虑,仅支持导出标准数据类型
--*/
/*--调用示例
--导出dBase
p_exporttb @sqlstr='select * from 地区资料',@path='c:\',@over=1
--*/
if exists (select * from dbo.sysobjects where id = object_id(N'[dbo].[p_exporttb]') and OBJECTPROPERTY(id, N'IsProcedure') = 1)
drop procedure [dbo].[p_exporttb]
GO
create proc p_exporttb
@sqlstr varchar(8000),--要导出的查询名
@path nvarchar(1000),--文件存放目录
@fname nvarchar(250)='temp.dbf',--文件名,默认为temp
@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)
--参数检测
if isnull(@fname,'')='' set @fname='temp.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
--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+'"'
--创建表的SQL
declare @tbname sysname
set @tbname='##tmp_'+convert(varchar(38),newid())
set @sql='select * into ['+@tbname+'] from('+@sqlstr+') a'
exec(@sql)
--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=''
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 tempdb..syscolumns a left join tempdb..systypes b on a.xtype=b.xusertype
where b.name not in('image','text','uniqueidentifier','sql_variant','ntext','varbinary','binary','timestamp')
and a.id=(select id from tempdb..sysobjects where name=@tbname)
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+'
--导入数据
exec('insert into '+@sql+'('+@fdlist+') select '+@fdlist+' from ['+@tbname+']')
set @sql='drop table ['+@tbname+']'
exec(@sql)
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
go
