Oracle 自增序列的生成

1、创建

-- Create sequence 
create sequence SEQ_USERID
minvalue 1
maxvalue 999999999999
start with 1
increment by 1
nocache
cycle;

2、查询

select SEQ_USERID.nextval from dual;
3、删除

drop sequence SEQ_USERID；

SELECT
    ‘DDL_DTL.‘ ||USER_TAB_COLS.COLUMN_NAME ||‘,‘
     
FROM USER_TAB_COLS
WHERE USER_TAB_COLS.TABLE_NAME=‘DIM_ERP_PUB_DDL_DTL‘