这条SQL语句将返回当前日期的星期几,结果可能是'星期一'、'星期二'等(取决于数据库的语言设置)。如果数据库的语言设置为英文,结果将是'monday'、'tuesday'等。 如果希望使用数字表示星期几,并且将周日视为一周的第一天,可以使用以下查询: sql SELECT TO_CHAR(SYSDATE, 'd') AS weekday_number FROM dual; ...
具体sql如下: CREATEORREPLACEfunctionGetWeekNum(currentDateINdate,weekStandardINvarchar2)returnvarchar2asfirstDayWeekNo NUMBER;--本年1号周几(以日历为基础,周一为第一天)fisrtWeekDayCount NUMBER;--本年第一周天数(以weekNo为标准)dayCount NUMBER;--总天数weekCount NUMBER;--总周数beginif currentDateisnul...
createorreplacefunctionGet_weekday(pDatedate)returnnumberis vResult number; begin selectcaseto_char(pDate,'FmDay','nls_date_language=english') when'Monday'then 1 when'Tuesday'then 2 when'Wednesday'then 3 when'Thursday'then 4 when'Friday'then 5 when'Saturday'then 6 when'Sunday'then 7 endd...
end_date IN date)RETURN number IScurrdate date := start_date; /* holds the next date */theDay varchar2(10); /* day of the week for currdate */countBusiness number := 0; /* counter for business days */BEGIN/* start date must be earlier than end dat...
SELECTTO_CHAR(currdate,'fmDay')INTOtheDayFROMdual; /*countitonlyifitisaweekday*/ IFtheDay<> 'Saturday' AND theDay<>'Sunday' THEN countBusiness := countBusiness + 1; END IF; END LOOP; RETURN (countBusiness); END; / SQL> SELECT num_Business_Days(to_date('2015-04-21','yyyy-mm-...
JOB_TYPE=>'plsql_block', JOB_ACTION=>'insert into emp select * from scott.emp where empno=7396', REPEAT_INTERVAL=>'freq=yearly;byyearday=-2', ENABLED=>TRUE); END; / 1. 2. 3. 4. 5. 6. 7. 8. 从上图可以看出,job的执行时间为17年12月30日,即17年的倒数第二天。
具体sql如下：CREATE OR REPLACE function GetWeekNum(currentDate IN date,weekStandard IN varchar2) return varchar2 as firstDayWeekNo NUMBER; --本年1号周⼏（以⽇历为基础，周⼀为第⼀天）fisrtWeekDayCount NUMBER; --本年第⼀周天数(以weekNo为标准)dayCount NUMBER; --总天数 weekCount ...
第一部分:oracle sql日期比较: oracle sql日期比较: 在今天之前: select * from up_date where update < to_date('2007-09-07 00:00:00','yyyy-mm-dd hh24:mi:ss') select * from up_date where update <= to_date('2007-09-07 00:00:00','yyyy-mm-dd hh24:mi:ss') ...
SELECTDATE_SUB(DATE_ADD(CURDATE(),INTERVAL1DAY),INTERVAL1SECOND),'今天23:59:59'UNIONSELECTDATE_SUB(CURDATE(),INTERVAL1DAY),'昨日0时'UNIONSELECTDATE_SUB(CURDATE(),INTERVALWEEKDAY(CURDATE())DAY),'本周第一天0时'UNIONSELECTDATE_SUB(CURDATE()+6,INTERVALWEEKDAY(CURDATE())DAY),'本周最后一天0...
2。Last_day 本月最后一天 SQL> Select last_day(sysdate) from dual;LAST_DAY(S --- 30-6月 -053。Add_months(d,n) 当前日期d后推n个月 用于从一个日期值增加或减少一些月份 date_value:=add_months(date_value,number_of_months)SQL> Select add_months(sysdate,2) from dual;ADD_MONTHS ...