Sql*plus中, 不允许sql语句中间有空行, 这在从其它地方拷贝脚本到sql*plus中执行时很麻烦. 比如下面的脚本:

[@more@]

select deptno, empno, ename
from emp

where empno = '7788';

如果拷贝到sql*plus中执行, 就会出现错误:

scott@O9I.US.ORACLE.COM> select deptno, empno, ename
  2  from emp
  3
scott@O9I.US.ORACLE.COM> where empno = '7788';
SP2-0734: unknown command beginning "where empn..." - rest of line ignored.
scott@O9I.US.ORACLE.COM>

原因是sqlplus遇到空行就认为是语句结束了.
其实要改变这种现象, 只要使用SQLBLANKLINES参数就可以了.

scott@O9I.US.ORACLE.COM> SET SQLBLANKLINES ON
scott@O9I.US.ORACLE.COM>
scott@O9I.US.ORACLE.COM> select deptno, empno, ename
  2  from emp
  3
  4  where empno = '7788';

    DEPTNO      EMPNO ENAME
---------- ---------- ----------
        20       7788 SCOTT

scott@O9I.US.ORACLE.COM>

(需要引用, 请注明出处: http://blog.itpub.net/oldwain)

sqlplus的小秘密2『By oldwain』