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);
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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>
