oracle时间函数
select TO_NUMBER(TO_CHAR(sysdate, 'DD')) from dual; --本月天数 select sysdate- TRUNC(sysdate, 'Q') + 1 from dual; --本季天数 select TO_NUMBER(TO_CHAR(sysdate, 'DDD')) from dual; --本年天数
select TO_NUMBER(TO_CHAR(sysdate, 'DD')) from dual; --本月天数 select sysdate- TRUNC(sysdate, 'Q') + 1 from dual; --本季天数 select TO_NUMBER(TO_CHAR(sysdate, 'DDD')) from dual; --本年天数