I would like to build a query, which returns all records 45 Minutes before the max timestamp.
For example the record with the latest timestamp is:
01.09.2013 11:00:00
Now I would like to have all records from
01.09.2013 10:15:00 to 11:00:00
You can accomplish this by using Max aggregate/analytic function and interval statement:
Here is an example:
select col
from ( select col
, max(col) over() as max_time
from t1) t
where t.col between t.max_time - interval '45' minute
and t.max_time
Result:
Col
--------------------
01.09.13 11:00:00 AM
01.09.13 10:45:00 AM
01.09.13 10:30:00 AM
01.09.13 10:15:00 AM
SQLFiddle Demo
with cte as
(select max(the_timestamp_field) the_timestamp_field
from test)
select
*
from
test,cte
where
test.the_timestamp_field between cte.the_timestamp_field - (1/24*.75)
and cte.the_timestamp_field
will do it.
It can be simple and a little complicated, depending on how do you want to determine the creation time of the record. If there is a date column in your table which indicates the creation time it's simple:
SELECT columns
FROM table
WHERE date_column BETWEEN TO_DATE ('01.09.2013 10:15', 'MM.DD.YYYY HH24:MI') AND
TO_DATE('01.09.2013 11:00', 'MM.DD.YYYY HH24:MI')
If there is no date column you can use SCN_TO_TIMESTAMP(ORA_ROWSCN) pseudo column to determine the creation time, but please note that this feture requires 10g or greater version.
Related
I have a table of sales with an ordered column as a timestamp type.
I would like to find the number of days since the last order. I though it should be simple.
I have tried various methods, but I can’t get a meaningful answer:
select max(ordered) from sales; -- 2022-05-17 22:47:24.467000
select sysdate-max(ordered) from sales; -- Unknown column type: 10
select current_time_stamp-max(ordered) from sales; -- Unknown column type: 10
I want to use the result in a CTE to then add to some other dates, so I thought it should at least result in either an interval type or a number of days.
How can I get the age of the above date?
There are 2 common options:
cast timestamp to date and use sysdate - cast(max(...) as date) - in this case you'll get a number in days:
SQL> select sysdate - cast(timestamp'2000-01-01 00:00:00' as date) diff1 from dual;
DIFF1
----------
8290.97766
use systimestamp - max(...) - in this case you'll get an Interval Day to Second:
SQL> select systimestamp - timestamp'2000-01-01 00:00:00' from dual;
SYSTIMESTAMP-TIMESTAMP'2000-01-0100:00:00'
------------------------------------------
+000008291 00:27:19.105859000
I have a requirement to take every 3 seconds data within the specific time interval in SQL. I am new to SQL so can anyone help me on the scenario
This is my select query which returns all the values but i need data for every 3 seconds only
SELECT ton_nbr
FROM
icr_file_interface
WHERE
(
reading_dttm BETWEEN
TO_DATE(concat('2016-10-19',to_char(0930)),'yyyy-mm-dd HH24MISS')
AND TO_DATE(concat('2016-10-19',to_char('0945')),'yyyy-mm-dd HH24MISS')
)
AND
(
ton_nbr BETWEEN
(SELECT value FROM text_para WHERE para_cd='ICR_ST_RNG')
AND (SELECT value FROM text_para WHERE para_cd='ICR_ED_RNG')
)
If you only need to subtract 3 seconds from a date, you can use the following:
SQL> select to_char(sysdate, 'yyyy-mm-dd hh24:mi:ss'),
2 to_char(sysdate - 3*1/24/60/60, 'yyyy-mm-dd hh24:mi:ss')
3 from dual;
TO_CHAR(SYSDATE,'YY TO_CHAR(SYSDATE-3*1
------------------- -------------------
2016-10-19 09:38:17 2016-10-19 09:38:14
Given that sysdate -1 means "subtract one day to sysdate", you can derive the number of seconds you need with a bit af arithmetic
This selects you data between last 3 seconds. Hope you got the idea.
select ton_nbr
from icr_file_interface
where reading_dttm between dateadd(ss, -3, getdate()) and getdate() ;
I have a table wchih has 2 columns. The definition is
CREATE TABLE LOGGING_T
(
TSTAMP DATE,
LINE VARCHAR2(300)
)
TABLESPACE OPERATIONS
MONITORING
/
The colulmn TSTAMP has values like 30-NOV-11, 29-NOV-11 ... and so on. Now i am doing this query
select * from LOGGING_T where TSTAMP >= (SYSDATE - 1)
The current system date is 01-DEC-11. Ideally, the above statement should return records which has TSTAMP = 30-NOV-11 since i am doing SYSDATE-1 which would be 30-NOV-11. But it isn't fetching those records. Why?
However, if i do this query
select * from LOGGING_T where TSTAMP >= (SYSDATE - 2)
Then it fetches records who TSTAMP is 30-NOV-11. Am i doing something wrong in this simple date operation?
A DATE contains time of day as well as the date.
If SYSDATE was 2011-12-01 1:18:00 PM then SYSDATE-1 would be 2011-11-30 1:18:00 PM.
Are the rows you are expecting to find from November 30th before or after the time element?
If you don't care about the time, and only want to filter based on the date, you can use TRUNC():
select *
from LOGGING_T
where TRUNC(TSTAMP) >= TRUNC(SYSDATE - 1);
You'll may or may not want to make sure both sides of your comparison operator are TRUNC()ed because TRUNC() will just force the time element of the date to be midnight.
select to_char(trunc(sysdate), 'YYYY-MM-DD HH:MI:SS PM')
from dual;
NOW
----------------------
2011-12-01 12:00:00 AM
The value SYSDATE has the time component as well. Most probably the date in your database also has the time component.
Change your query to :
select * from LOGGING_T where TSTAMP >= TRUNC(SYSDATE - 1)
to see all records which were logged from 00:00 yesterday.
To see the actual timecomponents, use to char.
SQL> select sysdate from dual;
SYSDATE
---------
01-DEC-11
1* select to_char(sysdate,'DD-Mon-YYYY HH24:MI:SS') date1 from dual
SQL> /
DATE1
--------------------
01-Dec-2011 16:29:01
I've got a question about date function on oracle.
I have the following table
statistic_table(
pages AS varchar(10),
date_created AS date
);
I have the following sql
SELECT COUNT(*) FROM statistic_table WHERE date_created BETWEEN sysdate-5 AND sysdate-1
and
SELECT COUNT(*) FROM statistic_table WHERE date_created BETWEEN to_date('12-AUG-2011') AND to_date('16-AUG-2011');
the question is, why is it return different numbers. assuming sysdate-5 returns 12-aug-2011 and sysdate-1 returns 16-aug-2011
Any help would be much appreciated!
Cheers,
sysdate - 5 will give you a date with the current time. So if I ran it at 1pm precisely, the query would be equivalent to:
select (*)
FROM statistic_table
WHERE date_created BETWEEN to_date('12-Aug-2011 13:00:00')
AND to_date('16-Aug-2011 13:00:00')
whereas the second query is:
select (*)
FROM statistic_table
WHERE date_created BETWEEN to_date('12-Aug-2011 00:00:00')
AND to_date('16-Aug-2011 00:00:00')
you should probably try this instead:
select (*)
FROM statistic_table
WHERE date_created BETWEEN trunc(sysdate) -5
AND trunc(sysdate) -1
A date in Oracle is a point in time with a precision of a second.
SYSDATE returns the current date and time and is therefore not the same as to_date('17-AUG-2011'):
SQL> SELECT to_char(sysdate, 'dd-mon-yyyy hh24:mi:ss') FROM DUAL;
TO_CHAR(SYSDATE,'DD-MON-YYYYHH
------------------------------
17-aug-2011 15:52:13
Use the TRUNC function if you only want the date component:
SQL> SELECT to_char(trunc(sysdate), 'dd-mon-yyyy hh24:mi:ss') FROM DUAL;
TO_CHAR(TRUNC(SYSDATE),'DD-MON
------------------------------
17-aou-2011 00:00:00
Because SYSDATE includes a time component, so if the current time is 11:22:33, then
SELECT COUNT(*) FROM statistic_table
WHERE date_created BETWEEN sysdate-5 AND sysdate-1
is actually equivalent to
SELECT COUNT(*) FROM statistic_table
WHERE date_created BETWEEN to_date('12-AUG-2011 11:22:33','DD-MON-YYYY HH24:MI:SS')
AND to_date('16-AUG-2011 11:22:33','DD-MON-YYYY HH24:MI:SS')
To avoid the time component do this:
SELECT COUNT(*) FROM statistic_table
WHERE date_created BETWEEN TRUNC(sysdate)-5 AND TRUNC(sysdate)-1
An Oracle DATE always has a day and a time component.
sysdate-5 returns a date exactly 5 days ago. If today is August 17 at 10 AM, for example, sysdate-5 returns August 12 at 10 AM.
to_date('12-AUG-2011', 'DD-MON-YYYY'), on the other hand, returns August 12 at midnight. So it returns a date that is 10 hours earlier than sysdate-5.
sysdate auto returns with a time component as mentioned by the previous answers.
When using to_date it is converting a string to a date. With this being said you can pass in parameters to make it return the same thing.
Have a look at this link that explains it.
to_date parameters
I have to get data from Oracle Table in which I have one datefield called lastupdatedDate and I want to get only that rows back in which lastupdatedDate is in last 10 mins of sysdate
For example, if in my table I have lastupdateDate as 05/20/09 4:20:44 then I want this row back in my result if I run the query in between 05/20/09 4:20:44 and 05/20/09 4:30:44, and not if if I run the query at 05/20/09 5:31:44.
Or slightly more readable:
select *
from mytable
where lastupdatedDate > sysdate - interval '10' minute
select *
from mytable
where lastupdatedDate > sysdate - interval '10' minute
select sysdate - 10/(24*60) from dual;
See above example to get sysdate minus ten minutes, now just add to your query