Oracle按天、按月統計數據

-----按天統計 select to_char(t.hiredate, 'yyyy/mm/dd') 日期, count(1) 數量 from EMP t where t.hiredate >= to_date('1980/1/1', 'yyyy/mm/dd') and t.hiredate <= to_date('2017/1/31', 'yyyy/mm/dd') group by t

>>阅读原文<<