我最近开始研究 oracle 数据库。通常我有许多 sqlplus 窗口打开到不同的 oracle 数据库。从一个 sqlplus 会话切换到另一个时，如何查看每个 sqlplus 会话的当前会话详细信息？非常感谢任何帮助！
【问题讨论】：
select * from global_name
我们可以从下面的查询中得到session的详细信息和状态：
select ' Sid, Serial#, Aud sid : '|| s.sid||' , '||s.serial#||' , '||
s.audsid||chr(10)|| ' DB User / OS User : '||s.username||
' / '||s.osuser||chr(10)|| ' Machine - Terminal : '||
s.machine||' - '|| s.terminal||chr(10)||
' OS Process Ids : '||
s.process||' (Client) '||p.spid||' (Server)'|| chr(10)||
' Client Program Name : '||s.program "Session Info"
from v$process p,v$session s
where p.addr = s.paddr
and s.sid = nvl('&SID',s.sid)
and nvl(s.terminal,' ') = nvl('&Terminal',nvl(s.terminal,' '))
and s.process = nvl('&Process',s.process)
and p.spid = nvl('&spid',p.spid)
and s.username = nvl('&username',s.username)
and nvl(s.osuser,' ') = nvl('&OSUser',nvl(s.osuser,' '))
and nvl(s.machine,' ') = nvl('&machine',nvl(s.machine,' '))
and nvl('&SID',nvl('&TERMINAL',nvl('&PROCESS',nvl('&SPID',nvl('&USERNAME',
nvl('&OSUSER',nvl('&MACHINE','NO VALUES'))))))) <> 'NO VALUES'
/
更多详情： https://ora-data.blogspot.in/2016/11/query-session-details.html
谢谢，
【讨论】：
select sys_context('USERENV','INSTANCE_NAME') from dual;
&
select instance_name from v$instance;
会给你实例名称。
也可以使用select * from global_name;查看实例的全局名称。
【讨论】：
SHOW PARAMETER 方法需要对v$instance 的查询访问权限，但这种SYS_CONTEXT 方法不需要。 (+)
我知道这是一个老问题，但我确实尝试了上述所有答案，但在我的情况下没有用。最终帮助我的是
SHOW PARAMETER instance_name
【讨论】：
看看这个(c) Tanel Poder。您可以从您的 glogin.sql 运行它（因此这些设置将在您每次连接时更新，或者只是手动运行它。注意host title 命令 - 它使用会话信息更改您的 sql*plus 控制台窗口标题 - 对于许多人来说非常有用窗户同时打开。
-- the Who am I script
def mysid="NA"
def _i_spid="NA"
def _i_cpid="NA"
def _i_opid="NA"
def _i_serial="NA"
def _i_inst="NA"
def _i_host="NA"
def _i_user="&_user"
def _i_conn="&_connect_identifier"
col i_username head USERNAME for a20
col i_sid head SID for a5 new_value mysid
col i_serial head SERIAL# for a8 new_value _i_serial
col i_cpid head CPID for a15 new_value _i_cpid
col i_spid head SPID for a15 new_value _i_spid
col i_opid head OPID for a5 new_value _i_opid
col i_host_name head HOST_NAME for a25 new_value _i_host
col i_instance_name head INST_NAME for a12 new_value _i_inst
col i_ver head VERSION for a10
col i_startup_day head STARTED for a8
col _i_user noprint new_value _i_user
col _i_conn noprint new_value _i_conn
col i_myoraver noprint new_value myoraver
select
s.username i_username,
i.instance_name i_instance_name,
i.host_name i_host_name,
to_char(s.sid) i_sid,
to_char(s.serial#) i_serial,
(select substr(banner, instr(banner, 'Release ')+8,10) from v$version where rownum = 1) i_ver,
(select substr(substr(banner, instr(banner, 'Release ')+8),
1,
instr(substr(banner, instr(banner, 'Release ')+8),'.')-1)
from v$version
where rownum = 1) i_myoraver,
to_char(startup_time, 'YYYYMMDD') i_startup_day,
p.spid i_spid,
trim(to_char(p.pid)) i_opid,
s.process i_cpid,
s.saddr saddr,
p.addr paddr,
lower(s.username) "_i_user",
upper('&_connect_identifier') "_i_conn"
from
v$session s,
v$instance i,
v$process p
where
s.paddr = p.addr
and
sid = (select sid from v$mystat where rownum = 1);
-- Windows CMD.exe specific stuff
-- host title %CP% &_i_user@&_i_conn [sid=&mysid ser#=&_i_serial spid=&_i_spid inst=&_i_inst host=&_i_host cpid=&_i_cpid opid=&_i_opid]
host title %CP% &_i_user@&_i_conn [sid=&mysid #=&_i_serial]
-- host doskey /exename=sqlplus.exe desc=set lines 80 sqlprompt ""$Tdescribe $*$Tset lines 299 sqlprompt "SQL> "
-- short xterm title
-- host echo -ne "\033]0;&_i_user@&_i_inst &mysid[&_i_spid]\007"
-- long xterm title
--host echo -ne "\033]0;host=&_i_host inst=&_i_inst sid=&mysid ser#=&_i_serial spid=&_i_spid cpid=&_i_cpid opid=&_i_opid\007"
def myopid=&_i_opid
def myspid=&_i_spid
def mycpid=&_i_cpid
-- undef _i_spid _i_inst _i_host _i_user _i_conn _i_cpid
样本输出：
17:39:35 SYSTEM@saz-dev> @sandbox
Connected.
18:29:02 SYSTEM@sandbox> @me
USERNAME INST_NAME HOST_NAME SID SERIAL# VERSION STARTED SPID OPID CPID SADDR PADDR
-------------------- ------------ ------------------------- ----- -------- ---------- -------- --------------- ----- --------------- -------- --------
SYSTEM xe OARS-SANDBOX 34 175 11.2.0.2.0 20130318 3348 30 6108:7776 6F549590 6FF51020
1 row selected.
Elapsed: 00:00:00.04
【讨论】：
试试：
select * from v$session where sid = SYS_CONTEXT('USERENV','SID');
您可能还对this AskTom post感兴趣
看到你的评论后，你可以这样做：
SELECT * FROM global_name;
【讨论】：
show user
获取连接用户
select instance_name from v$instance
在sqlplus中获取实例或设置
set sqlprompt "_USER'@'_CONNECT_IDENTIFIER> "
【讨论】：
select * from v$session
where sid = to_number(substr(dbms_session.unique_session_id,1,4),'XXXX')
【讨论】：