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Oracle上机试验报告
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标题：Oracle上机试验报告
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wangxinxin
发表于：2010-12-11 10:58:44
以下内容含脚本,或可能导致页面不正常的代码
环境<font face="宋体 ">：</font><font face="Times New="New" Roman="Roman" ">SQLPlus</font><font face="宋体 ">下</font> <table class="t_table" cellspacing="0"> <tbody> <tr> <td width="609"><font size="3">SQL> select * from v$version;</font> <font size="3">BANNER</font> <font size="3">----------------------------------------------------------------</font> <font size="3">Oracle9i Release 9.2.0.1.0 - Production</font> <font size="3">PL/SQL Release 9.2.0.1.0 - Production</font> <font size="3">CORE 9.2.0.1.0 Production</font> <font size="3">TNS for 32-bit Windows: Version 9.2.0.1.0 - Production</font> <font size="3">NLSRTL Version 9.2.0.1.0 - Production</font> </td></tr></tbody></table><font face="Times New="New" Roman="Roman" "></font> <strong><font face="宋体 ">问题一：</font></strong> <strong><font face="宋体 ">问题名称</font></strong><font face="宋体 ">：输入字符</font><font face="Times New="New" Roman="Roman" ">&</font><font face="宋体 ">的问题</font> <strong><font face="宋体 ">问题描述</font></strong><font face="宋体 ">：在</font><font face="Times New="New" Roman="Roman" ">INSERT INTO DEPARTMENT VALUES('4','Math & Science','444');</font><font face="宋体 ">插入该条记录的时候发现</font><font face="Times New="New" Roman="Roman" ">&</font><font face="宋体 ">及后面的字符被忽略掉了，不能正确插入（</font><font face="Times New="New" Roman="Roman" ">department</font><font face="宋体 ">表已建立，且记录符合约束）。</font> <strong><font face="宋体 ">问题分析</font></strong><font face="宋体 ">：在</font><font face="Times New="New" Roman="Roman" ">Oracle9i</font><font face="宋体 ">中</font><font face="Times New="New" Roman="Roman" ">&</font><font face="宋体 ">是有特殊含义的字符，默认状态其功能为指出一个变量，故不能正确插入，若想输入必须禁用此功能或者绕过此功能。</font> <strong><font face="宋体 ">问题<span class="t_tag" onclick="tagshow(event)" href="tag.php?name=%BD%E2%BE%F6">解决</span></font></strong><font face="宋体 ">：经过检索资料以及实验发现有四种方法可以解决该问题。</font> <font face="Times New="New" Roman="Roman" "></font> <strong><font face="宋体 ">解决方法</font><font face="Times New="New" Roman="Roman" ">1</font></strong><font face="宋体 ">：在</font><font face="Times New="New" Roman="Roman" ">SQLPlus</font><font face="宋体 ">中使用</font><font face="Times New="New" Roman="Roman" ">set scan off</font><font face="宋体 ">命令关闭输入检测</font> <table class="t_table" cellspacing="0"> <tbody> <tr> <td width="595"><font size="3"> SQL>set scan off</font> <font size="3">SQL>INSERT INTO DEPARTMENT VALUES('4','Math & Science','444');</font> <font size="3"><font face="宋体 ">已创建</font> 1 <font face="宋体 ">行。</font></font> <font size="3">SQL> select * from department;</font> <font size="3"> </font><font size="3">DEPTID DEPTNAME FACULTYID</font> <font size="3">---------- -------------------- ----------</font> <font size="3"> 4 Math & Science 444</font> </td></tr></tbody></table><font face="Times New="New" Roman="Roman" "> </font> <strong><font face="宋体 ">解决方法</font><font face="Times New="New" Roman="Roman" ">2</font></strong><font face="宋体 ">：在</font><font face="Times New="New" Roman="Roman" ">SQLPlus</font><font face="宋体 ">中利用</font><font face="Times New="New" Roman="Roman" ">set define off</font><font face="宋体 ">命令关闭定义在符号</font><font face="Times New="New" Roman="Roman" ">&</font><font face="宋体 ">上的功能</font> <table class="t_table" cellspacing="0"> <tbody> <tr> <td width="595"><font size="3">SQL> set scan on</font> <font size="3">SQL> truncate table department;</font> <font size="3"><font face="宋体 ">表已截掉。</font></font> <font size="3">SQL> set define off</font> <font size="3">SQL>INSERT INTO DEPARTMENT VALUES('4','Math & Science','444');</font> <font size="3"><font face="宋体 ">已创建</font> 1 <font face="宋体 ">行。</font></font> <font size="3">SQL> select * from department;</font> <font size="3"> </font> <font size="3">DEPTID DEPTNAME FACULTYID</font> <font size="3">---------- -------------------- ----------</font> <font size="3"> 4 Math & Science 444</font> </td></tr></tbody></table><font face="Times New="New" Roman="Roman" "></font> <font face="Times New="New" Roman="Roman" "> </font><strong><font face="宋体 ">解决方法</font><font face="Times New="New" Roman="Roman" ">3</font></strong><font face="宋体 ">：利用变量输入来绕过</font><font face="Times New="New" Roman="Roman" ">&</font><font face="宋体 ">功能</font> <table class="t_table" cellspacing="0"> <tbody> <tr> <td width="595"><font size="3">SQL> set define on</font> <font size="3">SQL> truncate table department;</font> <font size="3"><font face="宋体 ">表已截掉。</font></font> <font size="3">SQL>INSERT INTO DEPARTMENT VALUES('4',&MAJOR,'444');</font> <font size="3"><font face="宋体 ">输入</font> major <font face="宋体 ">的值</font>: 'Math & Science'</font> <font size="3"><font face="宋体 ">原值</font>1: INSERT INTO DEPARTMENT VALUES('4',&MAJOR,'444')</font> <font size="3"><font face="宋体 ">新值</font>1: INSERT INTO DEPARTMENT VALUES('4','Math & Science','444')</font> <font size="3"><font face="宋体 ">已创建</font> 1 <font face="宋体 ">行。</font></font> <font size="3">SQL> select * from department;</font><font size="3"> DEPTID DEPTNAME FACULTYID</font> <font size="3">---------- -------------------- ----------</font><font size="3"> 4 Math & Science 444</font> </td></tr></tbody></table><font face="Times New="New" Roman="Roman" "></font> <strong><font face="宋体 ">解决方法</font><font face="Times New="New" Roman="Roman" ">4</font></strong><font face="宋体 ">：用</font><font face="Times New="New" Roman="Roman" ">chr</font><font face="宋体 ">函数来替换</font><font face="Times New="New" Roman="Roman" ">'&'</font><font face="宋体 ">字符</font> <table class="t_table" cellspacing="0"> <tbody> <tr> <td width="595"><font size="3">SQL> truncate table department;</font> <font size="3"><font face="宋体 ">表已截掉。</font></font> <font size="3">SQL> select ascii('&') from dual;</font> <font size="3">ASCII('&')</font> <font size="3">----------</font> <font size="3"> 38</font> <p align="left"><font size="3">SQL>INSERT INTO DEPARTMENT VALUES('4','Math '||chr(38)||' Science','444');</font> <font size="3"><font face="宋体 ">已创建</font> 1 <font face="宋体 ">行。</font></font> <font size="3">SQL> select * from department;</font><font size="3"> DEPTID DEPTNAME FACULTYID</font> <font size="3">---------- -------------------- ----------</font> <font size="3"> 4 Math & Science 444</font> </td></tr></tbody></table><font face="Times New="New" Roman="Roman" "></font><strong><font face="宋体 ">问题总结</font></strong><font face="宋体 ">：在上述问题的解决方法中方法</font><font face="Times New="New" Roman="Roman" ">1</font><font face="宋体 ">与方法</font><font face="Times New="New" Roman="Roman" ">2</font><font face="宋体 ">属于</font><font face="Times New="New" Roman="Roman" ">SQLPlus</font><font face="宋体 ">命令类型，且只能用于</font><font face="Times New="New" Roman="Roman" ">SQLPlus</font><font face="宋体 ">环境中，通用性不够。方法</font><font face="Times New="New" Roman="Roman" ">3</font><font face="宋体 ">需要人机交互，不适合<span class="t_tag" onclick="tagshow(event)" href="tag.php?name=%CF%B5%CD%B3">系统</span>的大规模的记录。方法</font><font face="Times New="New" Roman="Roman" ">4</font><font face="宋体 ">是函数法，通用性与批处理能力都不错，只是在可读性方面差点。</font> <font face="Times New="New" Roman="Roman" "></font> <font face="Times New="New" Roman="Roman" "></font> <font face="Times New="New" Roman="Roman" "> B06060314</font> <font face="Times New="New" Roman="Roman" "> </font><font face="宋体 ">davelv</font>
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