oracle 11g在%oracle_home%/sqlplus/admin/下面會有一個glogin.sql檔案，每次sqlplus啟動的時候都會查詢並執行這個檔案，可以用這個檔案來儲存一些設定。讀完glogin.sql這個檔案之後，oracle還會查詢login.sql這個檔案，這是10G以及以上版本新新增的，這個檔案通常被放置在%oracle_home%/sqlplus/admin/下sqlplus 每次啟動前，會讀login.sql（若有的話） ,然後才是glogin.sql，login.sql只對某特定使用者生效，它的優先順序高於glogin.sql，glogin.sql是全域性設定。
　　所以,同一個環境變數，比如linesize ,glogin.sql 和login.sql 都有設定，則login.sql 中的設定起作用。glogin.sql 的檔案位置固定，在$ORACLE_HOME/sqlplus/admin 下面login.sql的位置不固定，一般將login.sql放在執行sqlplus 的當前目錄(用pwd檢視當前目錄)，即：/home/oralce。

serveroutput

dbms_output.put_line將必要的資訊輸出，以便對儲存過程進行除錯，只有將serveroutput變數設為on後，資訊才能顯示在螢幕上。

pagesize

頁面顯示行數
show pagesize;
set pagesize 50;

linesize

行寬度預設是80
show linesize;
set linesize 100;

trimspool

set trimspool on
去除重定向（spool）輸出每行的拖尾空格，預設為off

　　修改頁面顯示和行的預設值，但是這種方法，在你下次進入Sql Plus的時候還要重新設定，很麻煩。所以可以修改預設設定。在Oracle的安裝目錄下找到glogin.sql，我安裝的是Oracle 11，這個檔案在11.2.0\dbhome\sqlplus\admin下，用搜索很容易找到。然後開啟這個檔案，

set serveroutput on size 1000000  
set trimspool on  
set long 5000  
set linesize 100  
set pagesize 9999  
set linesize 154  
col GROUP# for 99  
col THREAD# for 99  
col SEQUENCE# for 9999  
col MEMBER for a50  
col MEMBERS for 99  
col name for a35  
col username for a15  
col file_name for a45  
col tablespace_name for
 
 a30  
col MACHINE for a30  
col program for a34  
col sid for 9999  
col spid for a8  
col value for a50  
col COMMENTS for a50  
col object_owner for a20  
col object_name for a30  
col TABLE_OWNER for a20  
col TABLE_NAME for a30  
col COLUMN_NAME for a30  
col owner for a15;  
col table_owner for a15  
col index_type for a10  
col DB_BLOCK_SIZE for a20  
col UNDO_RETENTION for a30  
col sql_text for a74  
col text for a60  
col r_owner for a15  
col index_owner for a15  
col GRANTEE for a15  
col GRANTOR for a15  
col PRIVILEGE for a35  
col PROPERTY_VALUE for a50  
col LAST_RUN_DURATION for a28  

col DEST_NAME for a20  
col DESTINATION for a30  
col PLAN_TABLE_OUTPUT for a130  
col SCHEMA_NAME for a20  
col OCCUPANT_NAME for a30  
col MOVE_PROCEDURE for a35  
col DESCRIPTION for a50  
col p1 for a30  
col p2 for a30  
col p3 for a30  
col p3text for a46  
col p2text for a46  

col OPERATION for a50  
col OPTIONS for a50  
col statement for a88  
col object for a50  
col error for a35  
col ARCHIVE_NAME for a40  
col segment_name for a25  
col segment_type for a25  
col COMPONENT for a25  
col parameter1 for a35  
col parameter2 for a35  
col parameter3 for a35  

col sql_redo for a90  
col sql_undo for a90  

col log_user for a10  
col priv_user for a10  
col schema_user for a11  
col INTERVAL for a20  
col what for a48  
col seg_name for a30  
col SQL_REDO for a90  

col pval2 for a50  
col event for a50  

col dest_name for a30  

col p1 for 99999999999999  
col p2 for 99999999999999  
col p3 for 99999999999999  
col maxbytes for 999999999999999999  

col MODE_REQUESTED for a30  
col MODE_HELD for a30  

col OPERATION for a30  
col options for a30  

--排程相關  
COL JOB_NAME for A15  
COL JOB_CREATOR for A11  
COL PROGRAM_OWNER for A11  
COL PROGRAM_NAME FOR A12  
COL SCHEDULE_NAME FOR A15  
COL SCHEDULE_OWNER FOR A14;  
col SCHEDULE_TYPE for a13  
COL RESOURCE_PLAN FOR A13;  
COL JOB_CLASS FOR A20  
col START_DATE for a20  
col END_DATE FOR a19  
col PROGRAM_ACTION for a45  
col COMMENTS for a15  
col WINDOW_NAME for a20  
col REPEAT_INTERVAL for a22  
col DURATION for a20  
col NEXT_START_DATE for a18  
col DURATION for a8  
col LAST_START_DATE for a18  
col job_action for a10  
col job_type for a10  

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