How to conver this sqlserver code into Oracle

Question

Hi,
Any one can help me how to covert below sqlserver code into Oracle?
DECLARE @t1 DATETIME;
DECLARE @t2 DATETIME;
SET @t1 = GETDATE();
select * from table;
SET @t2 = GETDATE();
SELECT DATEDIFF(millisecond,@t1,@t2) AS elapsed_ms;

Answer 1

Hi,
Do Like This ,
This is The function going to calculate elapsed time ,execute this before the second script,
CREATE function DATEDIFF
  startTime in timestamp with time zone,
  endTime in timestamp with time zone
return number
as
  interval_ interval day (9) to second (3);
begin
  interval_ := endTime - startTime;
  return (extract(day from (interval_)) * 86400 +
         extract(hour from (interval_)) * 3600 +
         extract(minute from (interval_)) * 60 +
         extract(second from (interval_))) * 1000;
end;And this Is the Script that i converted to oracle,
SET server out put on;
DECLARE
   v_t1         TIMESTAMP;
   v_t2         TIMESTAMP;
   lv_cur       sys_refcursor;
   lv_elapsed   VARCHAR2 (30);
BEGIN
   v_t1 := SYSTIMESTAMP;
   OPEN lv_cur FOR
      SELECT *
        FROM emp;
   v_t2 := SYSTIMESTAMP;
   SELECT datediff (v_t1, v_t2) elapsed_ms
     INTO lv_elapsed
     FROM DUAL;
   DBMS_OUTPUT.put_line (v_t1);
   DBMS_OUTPUT.put_line (v_t2);
END;Thanks & Rgds
BCV.