在表中循环插入日期--创建会话级临时表create global temporary table rq(id number primary key ,sj varchar2(20))on commit preserve rowsselect * from rq--循环插入日期declare c_i number :=1;v_i number ;v_firstday varchar2(20);v_lastday  varchar(20);begin  select to_char(sysdate,‘yyyy-mm‘)||‘-‘ into v_firstday from dual;  select to_char(last_day(sysdate),‘yyyy-mm-dd‘) into v_lastday from dual;  select ceil(last_day(sysdate)-trunc(sysdate,‘mm‘))+1 into v_i from dual;  loop    insert into rq (id,sj) values(c_i,v_firstday||to_char(c_i));    c_i:=c_i+1;    exit when c_i=v_i;    end loop;  end;