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第一次上传 这是考试得时候收集得 有关DB2701认证得教程

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<td width="90%"><font size="4" face="Verdana, Arial, Helvetica"><b>IMPORT 选项</b></font></td><td width="200" align="right"><font size="1" face="Verdana, Arial, Helvetica"><nobr>   第 2 页（共4 页）</nobr></font></td>
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<p>
						
<code>IMPORT</code> 基本上是一个向表中批量插入数据的实用程序。这种批量插入操作就象正常的插入语句，因为它对活动记录日志，对索引进行更新，对引用完整性进行检查，还对表约束进行检查。缺省情况下，<code>IMPORT</code> 只在操作结束时提交一次。如果向表中导入或插入了大量的行，那么就需要足够的事务日志以备回滚和恢复。您可以请求进行定期提交，以防止日志变满。如果在导入操作期间发生故障，那么定期提交插入操作还能使您减少丢失的行的数目。<code>COMMITCOUNT</code> 选项强制在导入一定数量的记录之后进行 <code>COMMIT</code>。这里有一个演示 <code>COMMITCOUNT</code> 选项使用方式的示例：</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
IMPORT FROM myfile.ixf OF IXF
    COMMITCOUNT 500 
    MESSAGES msg.out
    INSERT INTO newtable
</code>
</pre>
<p>如果上面的命令因为某些原因而执行失败，那么您可以使用消息文件确定被成功导入并提交的最后一行。然后，您可以使用 <code>RESTARTCOUNT</code> 选项重新启动导入。在下面的命令中，实用程序将跳过前面的 30000 条记录才开始 <code>IMPORT</code> 操作。</p>
<pre>
<code style="font-family: Courier New, Courier, monospace; font-size: 12">
IMPORT FROM myfile.ixf OF IXF
    COMMITCOUNT 500 RESTARTCOUNT 30000 
    MESSAGES msg.out
    INSERT INTO newtable</code>
</pre>
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