关于oracle

通常,术语"oracle数据库"既用来指存储在硬盘上的内部存有数据的数据库文件,也指用来管理这些文件的内存结构.事实上,术语"数据库"归属于数据文件,而实例则归属于内存结构.
一个实例由SGA(system global area)以及一系列后台进程组成.每一个连接到数据库的用户都是通过一个客户端进程来进行管理的.客户端进程与服务器进程是相联结的,每一个服务器进程都会被分配一块私有的内存区域.称为PGA(process global area).

关于oracle_第1张图片

oracle安装在windows,提示要装.netframework,装好后,感觉就慢了很多.不是需要,闲着装这毛就是找麻烦,相对于装在redhat就方便多了.还是mysql方便...

顺便记一下oracle的spring开发连接配置.

	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
		<property name="driverClass" value="${db.driverClass}" />
		<property name="jdbcUrl" value="${db.jdbcUrl}" />
		<property name="user" value="${db.user}" />
		<property name="password" value="${db.password}" />
		<property name="minPoolSize" value="1" />
		<property name="maxPoolSize" value="300" />
		<property name="maxIdleTime" value="60" />
		<property name="acquireIncrement" value="5" />
		<property name="idleConnectionTestPeriod" value="60" />
	</bean>

db.driverClass=oracle.jdbc.driver.OracleDriver
db.jdbcUrl=jdbc:oracle:thin:@192.168.0.119:1521:ora10g
db.user=mks
db.password=mks


----------也顺便记一下h2嵌入式内存数据库---------------

0.pom.xml

        <dependency>
            <groupId>com.h2database</groupId>
            <artifactId>h2</artifactId>
            <version>1.3.163</version>
            <scope>runtime</scope>
        </dependency>

1.web.xml

    <servlet>
        <servlet-name>h2</servlet-name>
        <servlet-class>org.h2.server.web.WebServlet</servlet-class>
    </servlet>
    <servlet-mapping>
        <servlet-name>h2</servlet-name>
        <url-pattern>/admin/h2/*</url-pattern>
    </servlet-mapping>

2.applicationContext.xml

    <jdbc:embedded-database id="dataSource" type="H2">
        <jdbc:script location="classpath:/database/h2/calendar-schema.sql"/>
        <jdbc:script location="classpath:/database/h2/calendar-data.sql"/>
    </jdbc:embedded-database>
    <bean id="transactionManager"
          class="org.springframework.jdbc.datasource.DataSourceTransactionManager"
          p:dataSource-ref="dataSource"/>
    <bean id="jdbcTemplate"
          class="org.springframework.jdbc.core.JdbcTemplate"
          p:dataSource-ref="dataSource"/>
3.

calendar-schema.sql

create table calendar_users (
    id bigint identity,
    email varchar(256) not null unique,
    password varchar(256) not null,
    first_name varchar(256) not null,
    last_name varchar(256) not null
);

create table events (
    id bigint identity,
    when timestamp not null,
    summary varchar(256) not null,
    description varchar(500) not null,
    owner bigint not null,
    attendee bigint not null,
    FOREIGN KEY(owner) REFERENCES calendar_users(id),
    FOREIGN KEY(attendee) REFERENCES calendar_users(id)
);
calendar-data.sql
insert into calendar_users(id,email,password,first_name,last_name) values (0,'[email protected]','user1','User','1');
insert into calendar_users(id,email,password,first_name,last_name) values (1,'[email protected]','admin1','Admin','1');
insert into calendar_users(id,email,password,first_name,last_name) values (2,'[email protected]','user2','User','2');

insert into events (id,when,summary,description,owner,attendee) values (100,'2013-10-04 20:30:00','Birthday Party','This is going to be a great birthday',0,1);
insert into events (id,when,summary,description,owner,attendee) values (101,'2013-12-23 13:00:00','Conference Call','Call with the client',2,0);
insert into events (id,when,summary,description,owner,attendee) values (102,'2014-01-23 11:30:00','Lunch','Eating lunch together',1,2);



你可能感兴趣的:(数据库)