mybatis-oracle 新增序列

1.参考

https://blog.csdn.net/qq_29001173/article/details/82106853

2.思考：

2.1获取序列下一个值：seq_car.nextval

2.2获取序列当前值：seq_car.currval

2.3查询序列：select seq_car.currval as id from dual