set pause on
 set pause '按<enter>键继续'
 select user_id,username,account_status from dba_users;
show newpage
set newpage 1
select user_id,username,account_status from dba_users;
 set pause on
 set pause '按<enter>键继续'
 select user_id,username,account_status from dba_users;
 set numformat $999,999,999.00
 select ename,job,sal from scott.emp;
spool c:\emp.txt
select empno,ename,job,sal from scott.emp where job='SALESMAN';
 select * from scott.dept;
 col sal format $999,999.00
 select empno,ename,sal from scott.emp;
 col empno heading 雇员编号
 col ename heading 雇员姓名
 col sal heading 雇员工资
 select empno,ename,sal from scott.emp;
 col comm null '空值'
 select empno,ename,comm from scott.emp where comm is null;
 col sal format $999,999.00
 col sal off
 select empno,ename,sal from scott.emp;
 set pagesize 8
 ttitle left '           销售情况排行表'
 btitle left '打印日期：2011年9月20日   打印人：东方'
 select * from scott.salgrade;
 set pagesize 8
 define varT='            雇员信息表'
 define varB='操作员：东方'
 ttitle left varT
 btitle left varB
 select empno,ename,job from scott.emp;
show newpage
newpage 1
set newpage 4
select user_id,username from dba_users;
col comm null 'TEXT'
select ename,comm from scott.emp where comm is null;