上月末的日期:select last_day(add_months(sysdate, -1)) from dual;
本月的最后一秒:select trunc(add_months(sysdate,1),'MM') - 1/24/60/60 from dual
本周星期一的日期:select trunc(sysdate,'day')+1 from dual
年初至今的天数:select ceil(sysdate - trunc(sysdate, 'year')) from dual;
今天是今年的第几周 :select to_char(sysdate,'fmww') from dual
今天是本月的第几周:SELECT TO_CHAR(SYSDATE,'WW') - TO_CHAR(TRUNC(SYSDATE,'MM'),'WW') + 1 AS "weekOfMon" FROM dual
本月的天数:SELECT to_char(last_day(SYSDATE),'dd') days FROM dual
今年的天数:select add_months(trunc(sysdate,'year'), 12) - trunc(sysdate,'year') from dual
下个星期一的日期 :SELECT Next_day(SYSDATE,'monday') FROM dual