NetBeans6.1入门教程 数据库的基本操作 作者：佚名 2009-06-15 13:59:00 开发 后端 本文为您介绍NetBeans6.1 入门教程中的数据库的基本操作，这里将通过图片的形式，为大家提供Netbeans 6.1链接数据库等基本操作。 通过NetBeans6.1向导建立和使用数据库 ***步：选择服务视图，然后展开DataBase（数据库节点），右键点击JavaDB 启动服务器， 第二种（重新创建表）抓取表结构实现数据库的重用 在讲如何创建表之前，先讲讲如何在已有表的情况下如何抓取表的结构（即创建表的SQL语句）
![如何抓取表的结构src="https://s5.51cto.com/oss/202207/19/a4e9fdf872a681ea3ae0992cf8024083c3ecbd.jpg" width=386 height=289> </P>
<P>填写好要保存的数据表结构名字，最后点击保存。</P>
<P>这样可以重复的利用已经写好的创建数据库表的SQL语句，以后要用到类似的表达饿时候就可以将其拿来修改，或者完全不修改的使用它来创建数据库。下面是截图：</P>
<P align=center><IMG border=0 alt=创建数据库 src="https://s3.51cto.com/oss/202207/19/91d1ea14324d1bb1f5a9853d4ec01496227792.jpg" width=500 height=287> </P>
<P>选择“重新创建表” 在弹出的对话框中找到数据库表的结构文件，也就是刚才我们保存的文件。选择以后点击打开按钮。</P>
<P align=center> </P>
<P align=center><IMG border=0 alt=重新创建表 src="https://s3.51cto.com/oss/202207/19/f1ec2c49171190774779564125e11940c708f3.jpg" width=451 height=287></P>
<P align=center> <IMG border=0 alt=命名表 src="https://s6.51cto.com/oss/202207/19/b53408d14ea7752834e682dae098ec3b515d24.jpg" width=480 height=384> </P>
<P align=center><IMG border=0 alt=SQL src="https://s3.51cto.com/oss/202207/19/173d838759f6d37a08b01841923e98dcd07ce1.jpg" width=480 height=379 处于可编辑状态> </P>
<P>对于截图中的SQL 语句还需要修改一下，因为使用的是JavaDB 数据库，SQL 语句有点问题，对NEWSID 字段设置自动增长应该是</P><PRE><OL class=dp-xml><LI class=alt><SPAN><SPAN>newsid int not null GENERATED BY DEFAULT AS IDENTITY, </SPAN></SPAN></LI></OL></PRE>
<P>最终的SQL 语句如下：</P><PRE><OL class=dp-sql><LI class=alt><SPAN><SPAN class=keyword>create</SPAN><SPAN> </SPAN><SPAN class=keyword>table</SPAN><SPAN> NEWS </SPAN></SPAN><LI><SPAN>( </SPAN><LI class=alt><SPAN>NEWSID </SPAN><SPAN class=keyword>INTEGER</SPAN><SPAN> GENERATED </SPAN><SPAN class=keyword>BY</SPAN><SPAN> </SPAN><SPAN class=keyword>DEFAULT</SPAN><SPAN> </SPAN><SPAN class=keyword>AS</SPAN><SPAN> IDENTITY </SPAN><SPAN class=op>not</SPAN><SPAN> </SPAN><SPAN class=op>null</SPAN><SPAN> </SPAN><SPAN class=keyword>primary</SPAN><SPAN> </SPAN><SPAN class=keyword>key</SPAN><SPAN>, </SPAN></SPAN><LI><SPAN>NEWSTITLE </SPAN><SPAN class=keyword>VARCHAR</SPAN><SPAN>(50) </SPAN><SPAN class=op>not</SPAN><SPAN> </SPAN><SPAN class=op>null</SPAN><SPAN>, </SPAN></SPAN><LI class=alt><SPAN>NEWSCONTENT </SPAN><SPAN class=keyword>VARCHAR</SPAN><SPAN>(200) </SPAN><SPAN class=op>not</SPAN><SPAN> </SPAN><SPAN class=op>null</SPAN><SPAN>, </SPAN></SPAN><LI><SPAN>NEWSDATE </SPAN><SPAN class=keyword>TIMESTAMP</SPAN><SPAN> </SPAN><SPAN class=keyword>default</SPAN><SPAN> </SPAN><SPAN class=func>CURRENT_TIMESTAMP</SPAN><SPAN> </SPAN><SPAN class=op>not</SPAN><SPAN> </SPAN><SPAN class=op>null</SPAN><SPAN>, </SPAN></SPAN><LI class=alt><SPAN>NEWSCOUNT </SPAN><SPAN class=keyword>INTEGER</SPAN><SPAN> </SPAN></SPAN><LI><SPAN>) </SPAN></LI></OL></PRE>
<P>执行完以后就可以看到左边的视图中就多了NEWS这张表</P>
<P align=center><IMG border=0 alt=执行完毕 src="https://s8.51cto.com/oss/202207/19/333035169f9b517ac60530d73a2ef3a1e9d24f.jpg" width=335 height=265> </P>
<P>输出窗口中显示:</P>
<P align=center><IMG border=0 alt=输出窗口显示 src="https://s9.51cto.com/oss/202207/19/14dc62581962666ecee3704befee7bc398ba35.jpg" width=297 height=168> </P>
<P>呵呵,右键点击“表”选择“刷新” ，</P>
<P align=center><IMG border=0 alt=刷新完毕 src="https://s2.51cto.com/oss/202207/19/58dd56d28f9d65f5ac3460690d5b4a5abe8a43.jpg" width=301 height=245></P>
<P></P>
<P> </P>
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</div> <div class="article-bottom"><span>责任编辑：张燕妮</span> <span>
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