误修改/u01权限/所有者的故障恢复

发表于 2015 年 7 月 1 日 由 惜分飞

有朋友找到我，说他对生产库做了误操作，导致数据库异常，请我帮忙处理,对/u01目录修改了用户和权限,导致数据库无法登录,但是业务还在继续
误操作命令

mkdir -p /u01/app/grid
mkdir -p /u01/app/11.2.0/grid
chown -R grid:oinstall /u01
mkdir -p /u01/app/oracle
chown oracle:oinstall /u01/app/oracle
chmod -R 775 /u01

尝试sqlplus登录数据库报ORA-12547

[oracle@www.xifenfei.com admin]$ sqlplus / as sysdba

SQL*Plus: Release 11.2.0.3.0 Production on Wed Jul 1 17:40:42 2015

Copyright (c) 1982, 2011, Oracle.  All rights reserved.

ERROR:
ORA-12547: TNS:lost contact


Enter user-name: 


ERROR:
ORA-12547: TNS:lost contact


Enter user-name: 

ERROR:
ORA-12547: TNS:lost contact


SP2-0157: unable to CONNECT to ORACLE after 3 attempts, exiting SQL*Plus

数据库alert日志报错

Wed Jul 01 18:03:22 2015
Errors in file /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/trace/xifenfei_ora_28977.trc  (incident=129553):
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/incident/incdir_129553/xifenfei_ora_28977_i129553.trc
Errors in file /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/incident/incdir_129553/xifenfei_ora_28977_i129553.trc:
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []
Wed Jul 01 18:03:22 2015
Errors in file /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/trace/xifenfei_ora_28979.trc  (incident=129561):
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/incident/incdir_129561/xifenfei_ora_28979_i129561.trc
Errors in file /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/incident/incdir_129561/xifenfei_ora_28979_i129561.trc:
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []
Wed Jul 01 18:03:22 2015
Errors in file /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/trace/xifenfei_ora_28985.trc  (incident=129569):
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/incident/incdir_129569/xifenfei_ora_28985_i129569.trc
Errors in file /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/incident/incdir_129569/xifenfei_ora_28985_i129569.trc:
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []
Wed Jul 01 18:03:22 2015
Errors in file /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/trace/xifenfei_ora_28983.trc  (incident=129577):
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []
Incident details in: /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/incident/incdir_129577/xifenfei_ora_28983_i129577.trc
Errors in file /u01/app/oracle/diag/rdbms/xifenfei/xifenfei/incident/incdir_129577/xifenfei_ora_28983_i129577.trc:
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []

trace文件信息

Dump file /u01/app/oracle/diag/rdbms/hybris01/hybris01/incident/incdir_129577/hybris01_ora_28983_i129577.trc
Oracle Database 11g Enterprise Edition Release 11.2.0.3.0 - 64bit Production
With the Partitioning, OLAP, Data Mining and Real Application Testing options
ORACLE_HOME = /u01/app/oracle/product/11.2.0/db_1
System name:	Linux
Node name:	dpppdridbo00
Release:	2.6.32-431.17.1.el6.x86_64
Version:	#1 SMP Wed May 7 23:32:49 UTC 2014
Machine:	x86_64
Instance name: hybris01
Redo thread mounted by this instance: 0 <none>
Oracle process number: 0
Unix process pid: 28983, image: oracle@dpppdridbo00


*** 2015-07-01 18:03:22.296
Dump continued from file: /u01/app/oracle/diag/rdbms/hybris01/hybris01/trace/hybris01_ora_28983.trc
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []

========= Dump for incident 129577 (ORA 600 [spstp: ORACLE_HOME uid does not match euid]) ========

*** 2015-07-01 18:03:22.297
dbkedDefDump(): Starting incident default dumps (flags=0x0, level=3, mask=0x0)
----- Error Stack Dump -----
ORA-00600: internal error code, arguments: [spstp: ORACLE_HOME uid does not match euid], [1100], [1101], [], [], [], [], [], [], [], [], []
----- SQL Statement (None) -----
Current SQL information unavailable - no SGA.

相关用户名相关信息

[oracle@dpppdridbo00 incdir_129577]$ id grid
uid=1100(grid) gid=1000(oinstall) groups=1000(oinstall),1100(asmadmin),1300(asmdba),1301(asmoper)
[oracle@dpppdridbo00 incdir_129577]$ id oracle
uid=1101(oracle) gid=1000(oinstall) groups=1000(oinstall),1200(dba),1300(asmdba)

这里比较明显，数据库的oracle_home,的所有者id为1101，但是被修改为了1100

查看相关目录文件权限

[oracle@www.xifenfei.com ~]$ env|grep ORA
ORACLE_SID=xifenfei
ORACLE_BASE=/u01/app/oracle
ORACLE_TERM=xterm
ORACLE_HOME=/u01/app/oracle/product/11.2.0/db_1
[oracle@www.xifenfei.com ~]$ cd /u01/app/oracle/product/11.2.0/db_1
[oracle@www.xifenfei.com db_1]$ ls -ltr
total 308
-rwxrwxr-x.  1 grid oinstall    63 Mar  1 16:39 oraInst.loc
drwxrwxr-x.  8 grid oinstall  4096 Mar  1 16:40 assistants
drwxrwxr-x.  6 grid oinstall  4096 Mar  1 16:40 crs
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:40 csmig
drwxrwxr-x.  7 grid oinstall  4096 Mar  1 16:40 cv
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:40 demo
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:40 diagnostics
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:40 has
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:40 emcli
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:40 dv
drwxrwxr-x.  8 grid oinstall  4096 Mar  1 16:40 ide
drwxrwxr-x.  8 grid oinstall  4096 Mar  1 16:40 javavm
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:40 jdev
drwxrwxr-x.  6 grid oinstall  4096 Mar  1 16:40 md
drwxrwxr-x.  6 grid oinstall  4096 Mar  1 16:40 nls
drwxrwxr-x.  6 grid oinstall  4096 Mar  1 16:40 odbc
drwxrwxr-x.  5 grid oinstall  4096 Mar  1 16:40 olap
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:40 oracore
drwxrwxr-x.  8 grid oinstall  4096 Mar  1 16:40 ord
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:40 owm
drwxrwxr-x.  7 grid oinstall  4096 Mar  1 16:40 precomp
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:40 scheduler
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:40 relnotes
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:40 slax
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:40 sqlj
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:40 wwg
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:40 usm
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:40 uix
drwxrwxr-x.  6 grid oinstall  4096 Mar  1 16:40 plsql
drwxrwxr-x.  2 grid oinstall  4096 Mar  1 16:40 utl
drwxrwxr-x.  7 grid oinstall  4096 Mar  1 16:40 xdk
drwxrwxr-x.  2 grid oinstall  4096 Mar  1 16:40 instantclient
drwxrwxr-x. 20 grid oinstall  4096 Mar  1 16:40 oc4j
drwxrwxr-x.  2 grid oinstall  4096 Mar  1 16:40 timingframework
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:41 clone
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:41 j2ee
drwxrwxr-x.  8 grid oinstall  4096 Mar  1 16:41 apex
drwxrwxr-x. 13 grid oinstall  4096 Mar  1 16:41 sqldeveloper
drwxrwxr-x.  2 grid oinstall  4096 Mar  1 16:41 jlib
drwxrwxr-x.  2 grid oinstall  4096 Mar  1 16:41 dc_ocm
drwxrwxr-x.  6 grid oinstall  4096 Mar  1 16:41 jdk
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:41 jdbc
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:41 ucp
drwxrwxr-x.  7 grid oinstall  4096 Mar  1 16:41 OPatch
drwxrwxr-x.  7 grid oinstall  4096 Mar  1 16:41 ccr
drwxrwxr-x. 26 grid oinstall  4096 Mar  1 16:41 owb
drwxrwxr-x.  6 grid oinstall  4096 Mar  1 16:41 mgw
drwxrwxr-x.  7 grid oinstall  4096 Mar  1 16:41 opmn
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:41 cdata
drwxrwxr-x.  6 grid oinstall  4096 Mar  1 16:41 css
drwxrwxr-x.  2 grid oinstall  4096 Mar  1 16:41 mesg
drwxrwxr-x.  2 grid oinstall  4096 Mar  1 16:41 config
drwxrwxr-x.  3 grid oinstall  4096 Mar  1 16:41 EMStage
drwxrwxr-x. 12 grid oinstall  4096 Mar  1 16:41 ldap
drwxrwxr-x. 15 grid oinstall  4096 Mar  1 16:41 sysman
drwxrwxr-x.  9 grid oinstall  4096 Mar  1 16:41 srvm
drwxrwxr-x.  7 grid oinstall  4096 Mar  1 16:41 racg
drwxrwxr-x. 10 grid oinstall  4096 Mar  1 16:41 ctx
drwxrwxr-x.  7 grid oinstall  4096 Mar  1 16:42 sqlplus
drwxrwxr-x.  8 grid oinstall  4096 Mar  1 16:42 oui
drwxrwxr-x.  4 grid oinstall 12288 Mar  1 16:42 lib
drwxrwxr-x.  5 grid oinstall  4096 Mar  1 16:42 perl
drwxrwxr-x. 11 grid oinstall  4096 Mar  1 16:42 network
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:42 deinstall
drwxrwxr-x.  5 grid oinstall  4096 Mar  1 16:42 hs
-rwxrwxr-x.  1 grid oinstall   494 Mar  1 16:42 root.sh
drwxrwxr-x. 13 grid oinstall  4096 Mar  1 16:42 rdbms
drwxrwxr-x. 13 grid oinstall  4096 Mar  1 16:42 inventory
drwxrwxr-x.  4 grid oinstall  4096 Mar  1 16:42 cfgtoollogs
drwxrwxr-x.  7 grid oinstall  4096 Mar  1 16:44 install
drwxrwxr-x.  2 grid oinstall 12288 Mar  1 16:44 bin
drwxrwxr-x.  4 grid oinstall  4096 Mar  4 18:49 log
drwxrwxr-x.  2 grid oinstall  4096 Jun 30 22:31 dbs

处理方法

root用户
chown -R oracle:oinstall /u01
chown oracle:oinstall /u01/app/oracle

oracle用户
chmod 6751 $ORACLE_HOME/bin/oracle

这里的修改权限,为了保证业务运行正常,是尽量往大的方向修改的,如果条件允许,在后期有条件的情况下,建议重新安装oracle软件

发表在 ORA-xxxxx | 标签为 , , | 评论关闭

ORA-00600[kjhn_post_ha_alert0-862]原因分析

发表于 2015 年 6 月 23 日 由 惜分飞

数据库版本和平台信息
数据库版本为10.2.0.1版本,而且是32位的win 2003 sp2之上

ORACLE V10.2.0.1.0 - Production vsnsta=0
vsnsql=14 vsnxtr=3
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options
Windows Server 2003 Version V5.2 Service Pack 2
CPU                 : 2 - type 586, 1 Physical Cores
Process Affinity    : 0x00000000
Memory (Avail/Total): Ph:2608M/3990M, Ph+PgF:4511M/5871M, VA:1242M/2047M
Instance name: orcl

数据库报大量ORA-600[kjhn_post_ha_alert0-862]错误
数据库的mmon进程报大量ORA-00600: internal error code, arguments: [kjhn_post_ha_alert0-862], [], [], [], [], [], [], []错误

Wed Jun 03 21:50:40 2015
Restarting dead background process MMON
MMON started with pid=11, OS id=3804
Wed Jun 03 21:50:43 2015
Errors in file e:\oracle\product\10.2.0\admin\orcl\bdump\orcl_mmon_3804.trc:
ORA-00600: internal error code, arguments: [kjhn_post_ha_alert0-862], [], [], [], [], [], [], []

Wed Jun 03 21:50:49 2015
Errors in file e:\oracle\product\10.2.0\admin\orcl\bdump\orcl_mmon_3804.trc:
ORA-00600: internal error code, arguments: [kjhn_post_ha_alert0-862], [], [], [], [], [], [], []

Wed Jun 03 21:55:44 2015
Errors in file e:\oracle\product\10.2.0\admin\orcl\bdump\orcl_mmon_3804.trc:
ORA-00600: internal error code, arguments: [kjhn_post_ha_alert0-862], [], [], [], [], [], [], []

Wed Jun 03 21:55:49 2015
Errors in file e:\oracle\product\10.2.0\admin\orcl\bdump\orcl_mmon_3804.trc:
ORA-00600: internal error code, arguments: [kjhn_post_ha_alert0-862], [], [], [], [], [], [], []

Wed Jun 03 22:00:40 2015
Thread 1 advanced to log sequence 476
  Current log# 1 seq# 476 mem# 0: E:\ORACLE\PRODUCT\10.2.0\ORADATA\ORCL\REDO01.LOG
Wed Jun 03 22:00:44 2015
Errors in file e:\oracle\product\10.2.0\admin\orcl\bdump\orcl_mmon_3804.trc:
ORA-00600: internal error code, arguments: [kjhn_post_ha_alert0-862], [], [], [], [], [], [], []

查询对应trace文件发现

ORA-00600: internal error code, arguments: [kjhn_post_ha_alert0-862], [], [], [] , [], [], [], [] 
Current SQL statement for this session: 
BEGIN :success := dbms_ha_alerts_prvt.check_ha_resources; END;

人工执行该过程

SQL> var success varchar2
SQL> begin
  2  :success := sys.dbms_ha_alerts_prvt.check_ha_resources;
  3  end;
  4  /
 
PL/SQL procedure successfully completed.
 
SQL> print success
 
SUCCESS                                                                       
  
--------------------------------                                              
  
N

通过查询相关资料得到如下说明

@ This check is triggered with FAN enabled at this instance and it seems to be 
@ associated with a startup action. From the procedure itself which is called 
@ this is a run-once MMON (startup) action which supports instance down 
@ notification reliability. It does the folowing a) registers the current 
@ instance incarnation in recent_resource_incarnations$ if it's not already 
@ there b) deletes recent_resource_incarnations$ records that don't apply to 
@ this database. They may, e.g., have been copied from seed db or from a former 
@ DataGuard primary c) scans recent_resource_incarnations$ for instance 
@ incarnations that are no longer alive, and submits instance down alerts for 
@ them . If all is good then return 'Y' else 'N' (or error) if there is a 
@ failure. That failure is to get back to MMON, so that it may retry this 
@ action later. In the local instance I get a 'Y' but in the customer's system 
@ it fails with a 'N' which seems related to the ORA-600 assert.

@ This function is kjhn_post_ha_alert0() which is internal and does the real work of 
@ posting HA alerts. It is used by both kjhn_post_ha_alert and 
@ kjn_post_ha_alert_plsql. Its parameters are basically the same as those of 
@ kjhn_post_ha_alert,other than the fact that it uses individual parameters 
@ rather than the more easily extensible structure. Also the parameters passed 
@ to it are the instance_name and the host_name which is the kernelized 
@ implementation for posting HA alerts. Without actually having the arguments 
@ the guess is that either the host_name or the instance_name raised in the 
@ assert is null which triggered it.

mmon进程尝试调用相关程序,然后无法得出正确值,返回N,然后会一直尝试,如果不能得到返回Y,就会一直报ORA-600,错误.通过上述的三种情况来说,都和recent_resource_incarnations$表有关系.
该故障原因是由于:mmon在调用kjhn_post_ha_alert0函数在执行的时候,如果发现参数host_name或者instance_name为null,就会报该错误出来.

处理方法
This problem has been documented as Bug 5173066 REPEATED ORA-600 [KJHN_POST_HA_ALERT0-862] FROM MMON PROCESS.
The bug is fixed in 11.1.0.6. A workaround is available for the problem.
该bug在11.1.0.6中得以修复

To implement the workaround, please execute the following steps as the SYS user: 

1. Collect the following information and spool it to a file for your records. 

a. output of select * from v$instance 
b. show parameter instance_name 
c. set pages 1000 
d. select * from recent_resource_incarnations$ 

2. Create a backup table of recent_resource_incarnations$. 

SQL> create table recent_resource_inc$bk as select * from recent_resource_incarnations$; 


3. Truncate recent_resource_incarnations$. Be sure to do this while the instance is up and running.
    Do not issue this statement if a shutdown is pending. 

SQL> truncate table recent_resource_incarnations$; 


4. Perform a clean shutdown, followed by a startup.

具体参考:
ORA-600 [kjhn_post_ha_alert0-862] Continuously Repeated in the Alert Log (Doc ID 401640.1)
Bug 5173066 : REPEATED ORA-600 [KJHN_POST_HA_ALERT0-862] FROM MMON PROCESS

发表在 ORA-xxxxx | 标签为 , | 一条评论

PostgreSQL简单操作之—创建库,登录,ddl,dml,help,登出,删除库

发表于 2015 年 6 月 21 日 由 惜分飞

PostgreSQL创建数据库
使用shell级别的createdb命令创建xifenfei库

-bash-3.2$ createdb xifenfei

系统认证登录PostgreSQL数据库
使用psql登录PostgreSQL中的xifenfei数据库

-bash-3.2$ psql xifenfei
psql (9.4.4)
Type "help" for help.

PostgreSQL简单查询测试
通过查询版本,当前日期,简单加法等sql语句,测试PostgreSQL中的sql操作

xifenfei=# 
xifenfei=# SELECT version();
                                                    version                                                    
---------------------------------------------------------------------------------------------------------------
 PostgreSQL 9.4.4 on x86_64-unknown-linux-gnu, compiled by gcc (GCC) 4.1.2 20080704 (Red Hat 4.1.2-55), 64-bit
(1 row)

xifenfei=# SELECT current_date;
    date    
------------
 2015-06-21
(1 row)

xifenfei=# SELECT 2 + 2;
 ?column? 
----------
        4
(1 row)

PostgreSQL数据库简单ddl和dml测试
通过创建表,插入/更新/删除记录,删除表等操作

xifenfei=# create table t_xifenfei(id int,name varchar(100));
CREATE TABLE
xifenfei=# insert into t_xifenfei values(1,'www.xifenfei.com');
INSERT 0 1
xifenfei=# select * from t_xifenfei;
 id |       name       
----+------------------
  1 | www.xifenfei.com
(1 row)

xifenfei=# insert into t_xifenfei values(2,'www.orasos.com');
INSERT 0 1
xifenfei=# select * from t_xifenfei;
 id |       name       
----+------------------
  1 | www.xifenfei.com
  2 | www.orasos.com
(2 rows)

xifenfei=# update t_xifenfei set name='WWW.XIFENFEI.COM' WHERE ID=2;
UPDATE 1
xifenfei=#  select * from t_xifenfei;
 id |       name       
----+------------------
  1 | www.xifenfei.com
  2 | WWW.XIFENFEI.COM
(2 rows)

xifenfei=# delete from t_xifenfei where id=2;
DELETE 1
xifenfei=# select * from t_xifenfei;
 id |       name       
----+------------------
  1 | www.xifenfei.com
(1 row)

xifenfei=# drop table t_xifenfei;
DROP TABLE
xifenfei=# select * from t_xifenfei;
ERROR:  relation "t_xifenfei" does not exist
LINE 1: select * from t_xifenfei;
                      ^

PostgreSQL数据库帮助使用方法
PostgreSQL数据库使用\h命令来查看帮助

xifenfei=# \h
Available help:
  ABORT                            CLUSTER                          DECLARE                          EXPLAIN
  ALTER AGGREGATE                  COMMENT                          DELETE                           FETCH
  ALTER COLLATION                  COMMIT                           DISCARD                          GRANT
  ALTER CONVERSION                 COMMIT PREPARED                  DO                               INSERT
  ALTER DATABASE                   COPY                             DROP AGGREGATE                   LISTEN
  ALTER DEFAULT PRIVILEGES         CREATE AGGREGATE                 DROP CAST                        LOAD
  ALTER DOMAIN                     CREATE CAST                      DROP COLLATION                   LOCK
  ALTER EVENT TRIGGER              CREATE COLLATION                 DROP CONVERSION                  MOVE
  ALTER EXTENSION                  CREATE CONVERSION                DROP DATABASE                    NOTIFY
  ALTER FOREIGN DATA WRAPPER       CREATE DATABASE                  DROP DOMAIN                      PREPARE
  ALTER FOREIGN TABLE              CREATE DOMAIN                    DROP EVENT TRIGGER               PREPARE TRANSACTION
  ALTER FUNCTION                   CREATE EVENT TRIGGER             DROP EXTENSION                   REASSIGN OWNED
  ALTER GROUP                      CREATE EXTENSION                 DROP FOREIGN DATA WRAPPER        REFRESH MATERIALIZED VIEW
  ALTER INDEX                      CREATE FOREIGN DATA WRAPPER      DROP FOREIGN TABLE               REINDEX
  ALTER LANGUAGE                   CREATE FOREIGN TABLE             DROP FUNCTION                    RELEASE SAVEPOINT
  ALTER LARGE OBJECT               CREATE FUNCTION                  DROP GROUP                       RESET
  ALTER MATERIALIZED VIEW          CREATE GROUP                     DROP INDEX                       REVOKE
  ALTER OPERATOR                   CREATE INDEX                     DROP LANGUAGE                    ROLLBACK
  ALTER OPERATOR CLASS             CREATE LANGUAGE                  DROP MATERIALIZED VIEW           ROLLBACK PREPARED
  ALTER OPERATOR FAMILY            CREATE MATERIALIZED VIEW         DROP OPERATOR                    ROLLBACK TO SAVEPOINT
  ALTER ROLE                       CREATE OPERATOR                  DROP OPERATOR CLASS              SAVEPOINT
  ALTER RULE                       CREATE OPERATOR CLASS            DROP OPERATOR FAMILY             SECURITY LABEL
  ALTER SCHEMA                     CREATE OPERATOR FAMILY           DROP OWNED                       SELECT
  ALTER SEQUENCE                   CREATE ROLE                      DROP ROLE                        SELECT INTO
  ALTER SERVER                     CREATE RULE                      DROP RULE                        SET
  ALTER SYSTEM                     CREATE SCHEMA                    DROP SCHEMA                      SET CONSTRAINTS
  ALTER TABLE                      CREATE SEQUENCE                  DROP SEQUENCE                    SET ROLE
  ALTER TABLESPACE                 CREATE SERVER                    DROP SERVER                      SET SESSION AUTHORIZATION
  ALTER TEXT SEARCH CONFIGURATION  CREATE TABLE                     DROP TABLE                       SET TRANSACTION
  ALTER TEXT SEARCH DICTIONARY     CREATE TABLE AS                  DROP TABLESPACE                  SHOW
  ALTER TEXT SEARCH PARSER         CREATE TABLESPACE                DROP TEXT SEARCH CONFIGURATION   START TRANSACTION
  ALTER TEXT SEARCH TEMPLATE       CREATE TEXT SEARCH CONFIGURATION DROP TEXT SEARCH DICTIONARY      TABLE
  ALTER TRIGGER                    CREATE TEXT SEARCH DICTIONARY    DROP TEXT SEARCH PARSER          TRUNCATE
  ALTER TYPE                       CREATE TEXT SEARCH PARSER        DROP TEXT SEARCH TEMPLATE        UNLISTEN
  ALTER USER                       CREATE TEXT SEARCH TEMPLATE      DROP TRIGGER                     UPDATE
  ALTER USER MAPPING               CREATE TRIGGER                   DROP TYPE                        VACUUM
  ALTER VIEW                       CREATE TYPE                      DROP USER                        VALUES
  ANALYZE                          CREATE USER                      DROP USER MAPPING                WITH
  BEGIN                            CREATE USER MAPPING              DROP VIEW                        
  CHECKPOINT                       CREATE VIEW                      END                              
  CLOSE                            DEALLOCATE                       EXECUTE

xifenfei-# \h CREATE TABLE AS
Command:     CREATE TABLE AS
Description: define a new table from the results of a query
Syntax:
CREATE [ [ GLOBAL | LOCAL ] { TEMPORARY | TEMP } | UNLOGGED ] TABLE table_name
    [ (column_name [, ...] ) ]
    [ WITH ( storage_parameter [= value] [, ... ] ) | WITH OIDS | WITHOUT OIDS ]
    [ ON COMMIT { PRESERVE ROWS | DELETE ROWS | DROP } ]
    [ TABLESPACE tablespace_name ]
    AS query
    [ WITH [ NO ] DATA ]

PostgreSQL退出登录

xifenfei-# \q
-bash-3.2$

PostgreSQL删除数据库

-bash-3.2$ dropdb xifenfei
-bash-3.2$ psql xifenfei
psql: FATAL:  database "xifenfei" does not exist
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