Select col_1, col_2
from my_table
where col_timestamp is between sysdate and (sysdate - 30/1440)
group by col_1
Assuming col_timestamp is a column in your table with datatype of DATE.
HTH
Raj
__
Rajendra Jamadagni MIS, ESPN Inc.
Lance,
My performance monitor aggregates frequent samples into smaller tables using
this method. I create a function then write a query using the function and
pass in the date column. The group by averages the values for me.
CREATE OR REPLACE FUNCTION nearest_even_hour (p_date IN DATE) RETURN
Lance,
Does you table load include a date field with the hh:mm:ss. If it does
not than how do you propose to find when a row was inserted. You could
use logminer and check the archivelogs if there was a crutial need to
know. I would add a column to the table that would hold a datetime stamp
and
An easier and more accurate method would be to create a column
in the table and populate it with a sequence.
When you run your query, include in the WHERE clause
' and my_sequence_num sequence_last_time_i_checked '
You would just need to record the last sequence number
checked in a single row
Yep, so long as there was a timestamp on the records.
-Original Message-
Sent: Thursday, January 24, 2002 12:55 PM
To: Multiple recipients of list ORACLE-L
I am not sure how to ask this or if it is even possible. I have a stored
procedure that runs every five minutes and writes the
If you have a field in the data that keeps track of when it was inserted
then you could always add a line in the where to check for a 30 minute
difference. Something like :
where sysdate-time_field = 30/1440
This should get you all data 30 minutes or less old.
-Original Message-
