Home Database Mysql Tutorial Oracle 特殊符号''的处理

Oracle 特殊符号''的处理

Jun 07, 2016 pm 05:10 PM

在SQL*Plus中默认的quot;quot;表示替代变量,也就是说,只要在命令中出现该符号,SQL*Plus就会要你输入替代值。这就意味着你无

在SQL*Plus中默认的"&"表示替代变量,也就是说,只要在命令中出现该符号,SQL*Plus就会要你输入替代值。这就意味着你无法将一个含有该符号的字符串输入数据库或赋给变量,如字符串“SQL&Plus”系统会理解为以“SQL”打头的字符串,它会提示你输入替代变量Plus的值,如果你输入ABC,则最终字符串转化为“SQLABC”。
方法一:set define off
set define off 则关闭该功能,"&"将作为普通字符,如上例,,最终字符就为“SQL&Plus”
set define off关闭替代变量功能
set define on 开启替代变量功能
set define *  将默认替代变量标志符该为"*"(也可以设为其它字符)
方法二:在SQL语句中将'&'替换成chr(38),因为chr(38)是'&'的ASCII码
SQL> Select 'Tom' || chr(38) || 'Jerry' from dual;
方法三:分拆原来的字符串
SQL> Select 'Tom' || '&' || 'Jerry' from dual;

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