SQL*Plus 系统变量之20 - ESC[APE]

SQL> define v=scott.dept                       ---定义置换变量

SQL> select * from &v;

原值    1: select * from &v

新值    1: select * from scott.dept

DEPTNO DNAME          LOC

---------- -------------- -------------

10 ACCOUNTING     NEW YORK

20 RESEARCH       DALLAS

30 SALES          CHICAGO

40 OPERATIONS     BOSTON

SQL> set escape on

SQL> select * from \&v;                        ---&已被转义，所以这条语句出错

SP2-0552: 未说明结合变量”V”