[root@node2 oracle]# ipcs -m------ Shared Memory Segments --------
key        shmid     owner     perms       bytes      nattch     status
0x00000000 32768     oracle     640        4096       0
0x00000000 65537     oracle     640        4096       0
0x00000000 98306     oracle     640        4096       0
0x00000000 131075    oracle     640        4096       0
0xefc07fc8 163844    oracle     640        4096       0      

SQL> select sid,serial# from v$session where username='SCOTT';SID    SERIAL#
---------- ----------19      109SQL> alter system kill session '19,109';System altered.SQL> select sid,serial#,status from v$session where username='SCOTT';SID    SERIAL# STATUS
---------- ---------- --------19      109   KILLED

SQL> conn test/test
Connected.
SQL> conn /as sysdba
Connected.
SQL> select name,password from sys.user$ where name='TEST';NAME                           PASSWORD
------------------------------ ------------------------------
TEST                           7A0F2B316C212D671 row selected.SQL> alter user test identified by hello;User altered.SQL> conn test/hello
Connected.
SQL> select * from tab;TNAME                          TABTYPE  CLUSTERID
------------------------------ ------- ----------
CHAINED_ROWS                   TABLE
EMPLOYEES                      TABLE
EMPLOYEES_TMP                  TABLE3 rows selected.SQL> conn /as sysdba
Connected.
SQL> alter user test identified by values '7A0F2B316C212D67';User altered.SQL> conn test/test
Connected.

SQL> select property_name,property_value from database_properties;

SQL> select  q'([@#$%^&*~?/" '])' from dual;Q'([@#$%^&*~?/"
---------------
[@#$%^&*~?/" ']SQL> select  q'2I'm Victor2' from dual;Q'2I'MVICT
----------
I'm Victor

TWO_TASK lets you silently support a tns network connect string, that is, instead of: sqlplus scott/tiger@tnsname
you can: export TWO_TASK=tnsname
sqlplus scott/tiger <<<== that has an implied @tnsname
oracle_sid is used for a local connection - direct to the server - without using a listener the environment variable name is LOCAL on windows NT. set LOCAL=service_name

SQL>  select wmsys.wm_concat(dname) from dept;WMSYS.WM_CONCAT(DNAME)
--------------------------------------------------------------------------------
ACCOUNTING,RESEARCH,SALES,OPERATIONS,IT

--将逗号替换为'|'号
SQL>  select replace(wmsys.wm_concat(dname),',','|') from dept;REPLACE(WMSYS.WM_CONCAT(DNAME),',','|')
--------------------------------------------------------------------------------
ACCOUNTING|RESEARCH|SALES|OPERATIONS|IT

SQL> select * from dept where deptno=10;DEPTNO DNAME          LOC
---------- -------------- -------------10 ACCOUNTING     NEW YORK

SQL> with t as 2    ( select deptno,dname,loc from dept where deptno=10)3  select to_char(deptno) from t4  union all5  select dname from t6  union all7  select loc from t;TO_CHAR(DEPTNO)
----------------------------------------
10
ACCOUNTING
NEW YORK

SQL> create table dual as (select * from dual union all select * from dual);Table created.SQL> select * from dual;D
-
X
XSQL> select sysdate from dual;SYSDATE
---------
10-JUN-15
10-JUN-15

SQL> select sid,serial#,blocking_session from v$session where username='SCOTT'; SID    SERIAL# BLOCKING_SESSION
---------- ---------- ----------------125          7              142SQL> select sid,serial#,username from V$session where sid=142;SID    SERIAL# USERNAME
---------- ---------- ------------------------------142         27 SYSSQL> alter system kill session '142,27';System altered.

SQL>define
DEFINE _DATE           = "16-JUL-15" (CHAR)
DEFINE _CONNECT_IDENTIFIER = "test" (CHAR)
DEFINE _USER           = "SCOTT" (CHAR)
DEFINE _PRIVILEGE      = "" (CHAR)
DEFINE _SQLPLUS_RELEASE = "1102000400" (CHAR)
DEFINE _EDITOR           = "vim" (CHAR)
DEFINE _O_VERSION      = "Oracle Database 11g Enterprise Edition Release 11.2.0.4.0 - Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options" (CHAR)
DEFINE _O_RELEASE      = "1102000400" (CHAR)

SQL>set sqlprompt &_USER@&_CONNECT_IDENTIFIER>
SCOTT@test>

SQL> select least(1,2,3) from dual;LEAST(1,2,3)
------------1SQL> SELECT greatest (1,2,3) from dual ;GREATEST(1,2,3)
---------------3

#!/usr/bin/sh
export ORACLE_HOME=/opt/app/oracle/product/11.2.0/
export TNS_ADMIN=/home/monitor
sqlplus='/opt/app/oracle/product/11.2.0/bin/sqlplus'
output=`$sqlplus -s test/test@orcl << EOF
set feedback off;
set heading off;
select count(*) from v$session where status='ACTIVE';
EOF`
echo $output

select count(*) from v where status='ACTIVE'
ERROR at line 1: ORA-04044: procedure, function, package, or type is not allowed here

#!/usr/bin/sh
export ORACLE_HOME=/opt/app/oracle/product/11.2.0/
export TNS_ADMIN=/home/monitor
session='$session'
sqlplus='/opt/app/oracle/product/11.2.0/bin/sqlplus'
output=`$sqlplus -s audit_vces/audit_vces@orcl << EOF
set feedback off;
set heading off;
select count(*) from v$session where status='ACTIVE';
EOF`
echo $output