1)返回当前时间 年月日小时分秒毫秒select to_char(current_timestamp(5),'DD-MON-YYYY HH24:MI:SSxFF') from dual;
2)返回当前 时间的秒毫秒,可以指定秒后面的精度(最大=9)select to_char(current_timestamp(9),'MI:SSxFF') from dual;
6.计算程序运行的时间(ms)
declare
type rc is ref cursor;
l_rc rc;
l_dummy all_objects.object_name%type;
l_start number default dbms_utility.get_time;
begin
for I in 1 .. 1000
loop
open l_rc for
'select object_name from all_objects '||
'where object_id = ' || i;
fetch l_rc into l_dummy;
close l_rc;
end loop;
dbms_output.put_line
( round( (dbms_utility.get_time-l_start)/100, 2 ) ||
' seconds...' );
end;
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