ORACLE SQL*PLUS环境变量设置及说明

1：查看当前用户的环境设置：

SQL> define
DEFINE _DATE           = "21-JAN-14" (CHAR)
DEFINE _CONNECT_IDENTIFIER = "updb" (CHAR)
DEFINE _USER           = "SCOTT" (CHAR)
DEFINE _PRIVILEGE      = "" (CHAR)
DEFINE _SQLPLUS_RELEASE = "1102000300" (CHAR)
DEFINE _EDITOR           = "ed" (CHAR)
DEFINE _O_VERSION      = "Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options" (CHAR)
DEFINE _O_RELEASE      = "1102000300" (CHAR)
SQL> 

2：当前用户设置环境：

SQL> define_editor = 'VI';
SQL> define
DEFINE _DATE           = "21-JAN-14" (CHAR)
DEFINE _CONNECT_IDENTIFIER = "updb" (CHAR)
DEFINE _USER           = "SCOTT" (CHAR)
DEFINE _PRIVILEGE      = "" (CHAR)
DEFINE _SQLPLUS_RELEASE = "1102000300" (CHAR)
DEFINE _EDITOR           = "VI" (CHAR)
DEFINE _O_VERSION      = "Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options" (CHAR)
DEFINE _O_RELEASE      = "1102000300" (CHAR)
SQL> 

3：编辑login.sql　

　当退出当前用户的时候，所设置的环境就自动恢复成默认值，可以在login.sql文件中做设置，就不用每次都手动修改：

[oracle@steven ~]$ cat login.sql
define_editor=vi
set serveroutput on size 1000000
set trimspool on
set long 5000
set linesize 100
set pagesize 9999
column plan_plus_exp format a80
column global_name new_value gname
set termout off
define gname=idle
column global_name new_value gname
select lower(user) || '@' || substr(global_name,1,decode( dot,0,length(global_name),dot-1))global_name
   from (select global_name,instr(global_name,'.') dot from global_name);
set sqlprompt '&gname> '
set termout on

4：对login.sql脚本进行说明

 define_editor=vi：设置SQL*Plus 使用的默认编辑器。可以把它设置为你中意的文本编辑器。
 set serveroutput on size unlimited：默认的打开DBMA_OUTPUT，设置缓冲区的大写尽可能大。
 set trimspool on：假脱机输出文件时，会去除问本行两端的空格，而且行宽不定，如果设置为OFF，假脱机输出文件宽度则等于所设置的linesize。
 set long 5000：设置选择LONG和CLUB列时显示的默认字节数。
 set linesize 100：设置SQL*Plus显示的文本行宽为100个字符。
 set pagesize 9999：pagesize可以控制SQL*Plus多久打印一次标题。
 column paln_plus_exp format a80：设置由AUTOTRACE得到的解释计划输出的默认宽度。a80通常足以放下整个计划。

select lower(user) || '@' || substr(global_name,1,decode( dot,0,length(global_name),dot-1))global_name
   from (select global_name,instr(global_name,'.') dot from global_name);
set sqlprompt '&gname> '：这部分用于简历SQL*Plus的提示符，告诉SQL*Plus取得global_name列中的最后一个值，并将这个值赋给变量gname.