1.建表
create table tb_od_acceptworkorder
(
id INTEGER primary key not null,
caseid VARCHAR2(100) not null,
city VARCHAR2(80),
);
--添加注释
comment on table tb_od_acceptworkorder '自受理工单';
comment on column tb_od_acceptworkorder.id '主键';
comment on column tb_od_acceptworkorder.caseid '工单号';
2.创建序列
--创建序列
create sequence ACCEPTWORKORDER_ID_SEQ
start with 1 --从1开始,不能小于最小值
maxvalue 9999999999999999999 --设置最大值
minvalue 0 --设置最小值
nocycle --一直累加,不循环
cache 5000 --缓存,表示一次产生5000个序号
noorder;
3.查看序列
--查看以创建的序列
select * from user_sequences;
--模糊搜索,序列
select * from user_sequences where sequence_name like '%MY%';
--序列名.currval 查看当前序列是多少
select ACCEPTWORKORDER_ID_SEQ.currval from dual
--序列名.nextval 查看序列的下一个值
select ACCEPTWORKORDER_ID_SEQ.nextval from dual