& 符号在 SQLPLUS 的转义

有时候，SQL语句中包含了 & 符号，&是数据库中存储的值，而非要求我们输入某个值， 如果你在 SQLPLUS中运行该SQL，

可以用 set define off 命令 忽略 &

举个例子：

SQL> select 'This is &Robinson' from dual;
Enter value for robinson: *
old 1: select 'This is &Robinson' from dual
new 1: select 'This is *' from dual

'THISIS*'
---------------------------
This is *

SQL> set define off
SQL> select 'This is &Robinson' from dual;

'THISIS&ROBINSON'
---------------------------------------------------
This is &Robinson