Oracle datediff evaluate the date, Week, and month Functions

Oracle datediff evaluate the date, Week, and month Functions

Oracledatediff date week month create or replace function datediff (type in varchar2, startTime in varchar2, endTime in varchar2, v in varchar2) return number as v_result number; SQL _1 varchar2 (200 ); begin dbms_output.put_line ('1'); if (type = 'day') then SQL _1: = 'select' | v | '(TO_NUMBER (to_date (''' | startTime | ''', ''yyyy-MM-DD '') -to_date (''' | endTime | ''', ''yyyy-MM-DD '') from dual'; dbms_output.put_line ('1 '); elsif (type = 'month') then SQL _1: = 'select' | v | '(months_between (to_date (''' | startTime | ''', ''yyyy-MM-DD '')-to_date (''' | endTime | ''', ''yyyy-MM-DD'') from dual '; dbms_output.put_line ('1'); elsif (type = 'Week ') then dbms_output.put_line ('1'); SQL _1: = 'select' | v | '(TO_NUMBER (to_date (''' | startTime | ''', ''yyyy-MM-DD '') -to_date (''' | endTime | ''', ''yyyy-MM-DD '')/7) from dual'; end if; dbms_output.put_line (SQL _1 ); execute immediate SQL _1 into v_result; return (v_result); end; -- first EXECUTE the above function, so that you can write this function in Oracle. You can use this method: select datediff ('Week ', '2014-09-01', '2014-08-01 ', 'round') from dual; -- Description 'Week' indicates week, 'month' indicates month, 'day' indicates the day-two dates are passed in the middle-the fourth parameter: round the week or month with 'row', round up with 'ceil 'and round down with 'floor'