小编Adi*_* N.的帖子

我想取current date,week number,first date in the week和last date in the week.它下面的SQL语句正在工作,但是当我在Oracle Apex中运行时,我得到了ORA-01843: not a valid month

declare
    date_value        char;
    week_value        pls_integer;
    start_date_value  char;
    end_date_value    char;
begin 
    SELECT 
         TO_CHAR(TRUNC(TO_DATE(CURRENT_DATE,'MM/DD/YYYY')),'DD.MM.YYYY')
    ,    TO_NUMBER(TO_CHAR(TO_DATE(CURRENT_DATE,'MM/DD/YYYY'),'WW'))
    ,    TO_CHAR(TRUNC(TO_DATE(CURRENT_DATE,'MM/DD/YYYY'), 'IW'),'DD.MM.YYYY')
    ,    TO_CHAR(NEXT_DAY(TRUNC(TO_DATE(CURRENT_DATE,'MM/DD/YYYY'),'IW'),'SUNDAY'),'DD.MM.YYYY') 
    INTO 
        date_value
    ,   week_value
    ,   start_date_value
    ,   end_date_value
    FROM DUAL;

    htp.p('<< '||'Week'|| week_value ||' >> '|| start_date_value ||' - '|| end_date_value);
end;

也尝试使用sysdate并且仅在SQL中有效但在PL/SQL(Oracle Apex)页面中抛出相同的异常.提前致谢.