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<br> <table width="145" border="0" cellspacing="0" cellpadding="0" bordercolor="#F8AC0E" align="center" height="20"> <tr bgcolor="000099" valign="middle"> <td width="109" align="center" class="p2"><font color="#FFFFFF"><b>Access 2000</b></font><font color="#FF3333" ><b></b></font></td> <td height="20" bgcolor="#E8E8E8" width="13"><img src="/pc/img/title_00.gif" width="13" height="20"></td> <td height="20" bgcolor="#E8E8E8" width="23"> </td> </tr> </table>
<p class="p1" style="line-height:17pt" align="left"> <span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12">
<a href="ac2k0101.htm">初识Access 2000<br>
</a></font><font color="#0000CC"> </font></span><span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12">
<a href="ac2k0201.htm">窗口接口使用简介<br>
</a></font></span><font color="#0000CC"><span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k0301.htm">用向导建立数据库</a></span></font><font color="#0000CC"><span class="p1"><a href="ac2k0301.htm">
<br>
</a><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k0401.htm">数据库的结构</a> <span class="p1"><a href="ac2k0403.htm">
</a></span> <br>
<font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k0501.htm">用表向导建立表</a></span></font> <font color="#0000CC"><span class="p1"><a href="ac2k0501.htm">
<br>
</a><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k0601.htm">在表中输入数据</a> <a href="ac2k0601.htm"><br>
</a><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k0701.htm">数据的类型和属性</a><span class="p1"> </span><br>
</span></font><span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k0801.htm">定义表之间的关系</a></span><span class="p1"><br>
<font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k0901.htm">建立简单的查询</a></span><span class="p1"> <br>
<font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k1001.htm">为查询制定规则</a><br>
<font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k1101.htm">如何建立数据窗体<br>
</a><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k1201.htm">生成数据打印报表</a></span><span class="p1"><br>
<font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k1301.htm">为WEB页提供数据</a></span><span class="p1"> <br>
<font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font></span>
<span class="p1"><a href="ac2k1401.htm">用图表显示数据</a></span> <br>
<span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font></span>
<span class="p1"><a href="ac2k1501.htm">宏的使用</a></span> <br>
<span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font></span>
<span class="p1"><a href="ac2k1601.htm">模块与“VBA”语言</a></span><a href="ac2k1601.htm"><span class="p1">
</span></a><br>
<span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font></span>
<span class="p1"><a href="ac2k1701.htm">SQL语言妙用</a></span> <br>
<span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font></span>
<span class="p1"><a href="ac2k1801.htm">外部数据的使用</a></span> <br>
<span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font></span>
<span class="p1">数据的优化和安全</span></p>
<p class="p1" style="line-height:17pt" align="left"> <a href="ac2k1901.htm">对表进行分析和优化</a><br>
<a href="ac2k1902.htm">对数据库性能分析</a><br>
<a href="ac2k1903.htm">安全管理</a><br>
<a href="ac2k1904.htm">设置和取消密码</a><br>
<a href="ac2k1905.htm">设置权限和帐号</a><br>
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<a href="ac2k2001.htm"><span class="p1">容易忽略的工作</span></a></p>
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如何加密/解密数据库</span></b></font> </p>
<p align="left"> <span style="line-height:17pt"> 对于一个普通的Access数据库文件，由于可以使用一些工具绕过它的密码，直接读取里面的数据表，所以必须有一种方法将这种数据库文件进行加密编码，以非法的访问情况，这样这个数据库才能算是安全的。<br>
如果要对某个某个数据库文件进行加密，只要单击“工具”菜单下“安全”选项下面的子菜单上的“加密/解密数据库”命令，就会弹出一个“加密/解密数据库”对话框，</span></p>
<p align="center"><img src="img/ac2k1916.gif" width="300" height="303" alt="“加密/解密数据库”对话框"></p>
<p align="left"><span style="line-height:17pt"> 在这个对话框中选取要进行加密的“数据库文件”然后单击“确定”按钮，这时又弹出一个“数据库加密后另存为”对话框，</span></p>
<p align="center"><img src="img/ac2k1917.gif" width="450" height="297" alt="“数据库加密后另存为”对话框"></p>
<p align="left"><span style="line-height:17pt"> 在这个对话框输入加密以后保存的数据库文件名。完成好后单击“保存”按钮就可以将这个数据库加密了。<br>
如果要解密这个数据库，只要按照这个步骤再作一次，只是选取的是加密的数据库文件，新生成的是解密以后的文件罢了。</span></p>
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<p align="center"><a href="ac2k1905.htm"><font size="2">上一节</font></a><font size="2"></font> </p>
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