1、删除序列--删除序列，如果存在则删除，如果不判断会报错declare num number;beginselect count（1） into num from user_sequences where sequence_name= 'SQ_Name'; if num=1 then execute immediate 'drop SEQUENCE SQ_Name'; end if;end;
2、创建序列DECLARE s_ID NUMBER;BEGINselect MAX(RECI锓旆痖颧D)+1 into s_ID from S_Tab造婷用痃leName;--序列起始号获得，某列的最大值+1EXECUTE immediate 'create sequence SQ_SequName minvalue 1 maxvalue 9999999999999999999999999999 start with '||s_ID||'increment by 1 cache 200';END;