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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">初識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">窗口接口使用簡介<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">用向導建立數(shù)據(jù)庫</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">數(shù)據(jù)庫的結構</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">用表向導建立表</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">在表中輸入數(shù)據(jù)</a> <a href="ac2k0601.htm"><br>
</a><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k0701.htm">數(shù)據(jù)的類型和屬性</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">定義表之間的關系</a></span><span class="p1"><br>
<font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k0901.htm">建立簡單的查詢</a></span><span class="p1"> <br>
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<a href="ac2k1001.htm">為查詢制定規(guī)則</a><br>
<font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k1101.htm">如何建立數(shù)據(jù)窗體<br>
</a><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k1201.htm">生成數(shù)據(jù)打印報表</a></span><span class="p1"><br>
<font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k1301.htm">為WEB頁提供數(shù)據(jù)</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">用圖表顯示數(shù)據(jù)</a></span> <br>
<span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font>
<a href="ac2k1301.htm"></a></span><span class="p1"></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>
<a href="ac2k1301.htm"></a></span><span class="p1"></span><span class="p1"><a href="ac2k1601.htm">模塊與“VBA”語言</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">SQL語言妙用</span></p>
<p style="line-height:17pt" align="left"> <a href="ac2k1701.htm">查詢中SQL視圖的切換</a><br>
<a href="ac2k1702.htm">基本的SQL語句</a><br>
<a href="ac2k1703.htm">使用SQL語句聯(lián)接表</a><br>
補充內容<br>
<br>
<span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font></span>
<a href="ac2k1801.htm"><span class="p1">外部數(shù)據(jù)的使用</span><br>
</a><span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font></span>
<a href="ac2k1901.htm"><span class="p1">數(shù)據(jù)的優(yōu)化和安全</span><br>
</a><span class="p1"><font color="#0000CC"><img src="img/small.gif" width="12" height="12"></font></span>
<a href="ac2k2001.htm"><span class="p1">容易忽略的工作</span></a></p>
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</span><span class="p3"><span style="line-height:17pt"> <b></b>定義新的字段名</span></span></b></font></p>
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<br>
在有的時候，將要建立的查詢中的字段名意義有了新的變化，不能再使用，或者有的新字段是由表達式構成的，這樣的字段都需要在查詢中為它們設定新的名字。在SQL中可以用“AS”操作來實現(xiàn)定義新的字段名。</span></p>
<p align="left"><span style="line-height:17pt"> 例如在新建的查詢中將“表1”中的“字段1”的內容對應到新字段“新字段1”中：
SELECT 表1.字段1 AS 新字段1 FROM 表1; 現(xiàn)在再看看這個查詢的數(shù)據(jù)表，可以看到在表中的字段名已經換成了“新字段1”了。</span></p>
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