Jcat
宠辱不惊,闲看庭前花开花落~~
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纯好人不用打:白羊

没人防:双子(迷宫)、天平(卡妙的冰箱)、射手(迷宫)

打死:巨蟹(紫龙)、山羊(紫龙自曝)、双鱼(阿瞬)、水瓶(冰河)

没打过,放水:狮子(星矢)、天蝎(冰河)、金牛(星矢)、处女(一辉)


这样看来紫龙是最NB的,一个人干掉2个,而且靠他师傅走后门天平不用打,还用天平的武器救了冰河。

冰河和他师傅干了2仗
冰河那段也挺NB,先是在天平被冻个半死,然后在天蝎被针扎个半死,最后到了水瓶还能把他师傅干掉
冰河和他师傅是最体现实力的一仗,纯实力对扣

合着星矢谁也没杀,就TM来打酱油的。。。
posted @ 2011-10-21 14:29 Jcat 阅读(543) | 评论 (1)编辑 收藏
简单过一遍,详细的以后遇到慢慢研究。
主要的更新在几个方面:
1. OUI的改进
2. Oracle Restart
3. ASM的增强!!!


New Grid Infrastructure Installation Option
 1. 单点包括:ASM、listener和Oracle Restart(监控、管理并自动重启各个组件)
 2. 集群包括:ASM、listener和Clusterware

New Desktop and Server Class Options
 1. Desktop Class:适用于笔记本、台式机
 2. Server Class:适用于服务器(功能上没区别,多一些高级配置选项)

Daylight Savings Time Upgrade of Timestamp with Timezone Data Type
 新的DBMS_DST包,优化对TIMESTAMP WITH TIMEZONE数据的管理

SYSASM Privilege
 管理ASM需要SYSASM权限,旨在分清ASM管理和DB管理

Fixup Scripts and Prerequisite Checks
 安装前检查时,如果遇到不符合要求的配置,OUI会对一些检查项自动生成fixup脚本,用root执行就可以解决相应问题。

New Tool to Configure Custom Installation Options
 OUI不在提供对单个组件的配置功能,如果需要只能用$ORACLE_HOME/bin/chopt命令行进行配置。我想Oracle的趋势就是为了让更多已经成熟的配置自动化,简化使用。

Deinstallation Tool
 OUI不再用来删除oracle软件,请使用$ORACLE_HOME/deinstall

Intelligent Data Placement
 指定ASM磁盘的磁盘范围,旨在将高频访问的数据放在HOT region(比如磁盘的外道)

Oracle Automatic Storage Management Cluster File System (Oracle ACFS)
 为其它文件提供ASM的存储功能

Data Pump Export and Data Pump Import
 Data Pump兼容Export/Import

Use Oracle Restart to Automatically Restart Your Database

 1. 针对单点环境
 2. 自动重启又问题的组件,如:db instance、listener、asm instance

New Method of Installing Oracle Automatic Storage Management
 以前,ASM的安装是伴随着DB的安装;现在是伴随着Software的安装。
 其实,就是把ASM上升到一个软件的高度(以前只是db的一个组件)

SRVCTL Support for Single Instance Database in a Cluster
 SRVCTL统一管理单点(with Restart)和集群数据库(with Clusterware)

Deprecated in Oracle Database 11g Release 2
 不支持裸设备了:要么用文件系统、要么用ASM,说白了,企业环境就必须用ASM
 不支持Oracle Ultra Search(9i的一个什么鸟功能)






















posted @ 2011-06-17 15:35 Jcat 阅读(802) | 评论 (0)编辑 收藏
重装完系统,mysql不需要重装,直接当绿色版使用,还更干净

//启动MYSQL
cd $MYSQL_HOME/bin
D:\JAVA\MYSQL\mysql-5.1.53-win32\bin>mysqld --console      
110616  1:26:26 [Note] Plugin 'FEDERATED' is disabled.
InnoDB: The log sequence number in ibdata files does not match
InnoDB: the log sequence number in the ib_logfiles!
110616  1:26:26  InnoDB: Database was not shut down normally!
InnoDB: Starting crash recovery.
InnoDB: Reading tablespace information from the .ibd files...
InnoDB: Restoring possible half-written data pages from the doublewrite
InnoDB: buffer...
110616  1:26:26  InnoDB: Started; log sequence number 0 44233
110616  1:26:27 [Note] Event Scheduler: Loaded 0 events
110616  1:26:27 [Note] mysqld: ready for connections.
Version: '5.1.53-community'  socket: ''  port: 3306  MySQL Community Server (GPL
)

//简单使用

mysql> show databases;
+--------------------+
| Database           |
+--------------------+
| information_schema |
| mysql              |
| test               |
+--------------------+
3 rows in set (0.03 sec)

mysql> use mysql
Database changed

mysql> show tables;
+---------------------------+
| Tables_in_mysql           |
+---------------------------+
| columns_priv              |
| db                        |
| event                     |
| func                      |
| general_log               |
| help_category             |
| help_keyword              |
| help_relation             |
| help_topic                |
| host                      |
| ndb_binlog_index          |


登陆
D:\JAVA\MYSQL\mysql-5.1.53-win32\bin>mysql.exe -uroot
创建数据库
mysql> create database testdb;




posted @ 2011-06-16 01:40 Jcat 阅读(918) | 评论 (1)编辑 收藏
--主键是非分区索引,也可以看作是全局
create table test_par1
(
  tdate   varchar2(8) primary key
)
partition by range ( tdate )
(
     partition p1 values less than ('20090201'),
     partition p2 values less than ('20090301'),
     partition pm values less than (MAXVALUE)  
) tablespace test;


--主键是分区索引
create table test_par2
(
  tdate   varchar2(8)
)
partition by range ( tdate )
(
     partition p1 values less than ('20090201'),
     partition p2 values less than ('20090301'),
     partition pm values less than (MAXVALUE)  
) tablespace test;

create index i_tdate2 on test_par2(tdate) local;

alter table test_par2 add constraint pk_tdate2 primary key(tdate);



--查看test_par2的DDL
select dbms_metadata.get_ddl( 'TABLE', 'TEST_PAR2' ) from dual;
--整理如下
create table test_par3
(
  tdate   varchar2(8),
  constraint pk_tdate3 primary key (tdate) using index local
)
partition by range ( tdate )
(
     partition p1 values less than ('20090201'),
     partition p2 values less than ('20090301'),
     partition pm values less than (MAXVALUE)  
) tablespace test;


这个案例也告诉我们,在做DDL时,尽量还是显示的写出属性,一些简易语法会引起不可知的定义。最后都用 get_ddl 再查一下,这才是Oracle真正执行的DDL。
posted @ 2010-09-15 15:26 Jcat 阅读(1275) | 评论 (0)编辑 收藏
列出所有实例
[db2inst1@dcm ~]$ db2ilist
db2inst1

列出当前实例下的所有数据库

[db2inst1@dcm ~]$ db2 list db directory

 System Database Directory

 Number of entries in the directory = 1

Database 1 entry:

 Database alias                       = SAMPLE
 Database name                        = SAMPLE
 Local database directory             = /home/db2inst1
 Database release level               = d.00
 Comment                              =
 Directory entry type                 = Indirect
 Catalog database partition number    = 0
 Alternate server hostname            =
 Alternate server port number         =

启动实例
[db2inst1@dcm ~]$ db2start
07/09/2010 14:24:36     0   0   SQL1063N  DB2START processing was successful.
SQL1063N  DB2START processing was successful.

连接到数据库
[db2inst1@dcm ~]$ db2 connect to sample

   Database Connection Information

 Database server        = DB2/LINUX 9.7.1
 SQL authorization ID   = DB2INST1
 Local database alias   = SAMPLE

执行SQL
[db2inst1@dcm ~]$ db2
db2 => select * from staff where dept=20

ID     NAME      DEPT   JOB   YEARS  SALARY    COMM     
------ --------- ------ ----- ------ --------- ---------
    10 Sanders       20 Mgr        7  98357.50         -
    20 Pernal        20 Sales      8  78171.25    612.45
    80 James         20 Clerk      -  43504.60    128.20
   190 Sneider       20 Clerk      8  34252.75    126.50

  4 record(s) selected.

退出
db2 => quit
DB20000I  The QUIT command completed successfully.

断开连接(不断开就不能db2stop)
[db2inst1@dcm ~]$ db2 connect reset
DB20000I  The SQL command completed successfully.

关闭实例
[db2inst1@dcm ~]$ db2stop
07/09/2010 14:29:32     0   0   SQL1064N  DB2STOP processing was successful.
SQL1064N  DB2STOP processing was successful.

posted @ 2010-07-09 14:32 Jcat 阅读(245) | 评论 (0)编辑 收藏