Oracle中添加自动编号的序列

 创建表zuocheng

create table zuocheng(id int  ,address char(25), pay int);

 

 

2. 创建自增序列

create sequence zc      //创建名为zc的序列

  increment   by   1    //自增长度为1

  start   with   1     //从1开始计数

  minvalue 1     //最小值为1

  nomaxvalue    //没有最大值

  nocache;      //不设置缓存

 

 

3. 为表zuocheng创建触发器

create or replace trigger zuocheng_id  //将触发器绑定在 id 这一列

before insert

on zuocheng

for each row

when(new.id is null)

begin

select zc.nextval into:new.id from dual;

end;

 

 

4. 插入数据

insert into zuocheng (address,pay) values('anh3u1i',345);

或者

insert into zuocheng values(zc.nextval,'anh3u1i',345);

 

 

==============================================

 

另外一种高级方法：

 

create table BHL_CLIENTLOG(  

   C_ID                   NUMBER(9) not null, 

   CLANNO                VARCHAR2(50),  

   CLANNAME               VARCHAR2(50),  

   DBNO               VARCHAR2(50),

   DBNAME              VARCHAR2(50),

   FILENO              VARCHAR2(50),  

    DATETIME              VARCHAR2(50),  

   STATUS                NUMBER(1),

   constraint BHL_CLIENTLOG primary key (C_ID)

);

 

create sequence SEQ_BHL_CLIENTLOG

increment by 1

start with 1

 minvalue 1

 cache 20

 maxvalue 999999999;

 

 

在项目数据库表ClientLog.htm.xml中设置

 

<hibernate-mapping>

<class name="com.bhl.datasync.bo.ClientLog" table="BHL_CLIENTLOG"> 

<id name="cId" type="java.lang.Integer" column="C_ID" length="9"> 

<generator class="native">

<param name="sequence">SEQ_BHL_CLIENTLOG</param>

</generator>

</id>

<property name="clanNo" type="java.lang.String" column="CLANNO" length="50" />

<property name="clanName" type="java.lang.String" column="CLANNAME" length="50" /> 

<property name="dbNo" type="java.lang.String" column="DBNO" length="50"/>

<property name="dbName" type="java.lang.String" column="DBNAME" length="50" />

<property name="fileNo" type="java.lang.String" column="FILENO" length="50" />

<property name="dateTime" type="java.lang.String" column="DATETIME" length="50" />

<property name="status" type="java.lang.Integer" column="STATUS" length="1" />

</class>

</hibernate-mapping>