In my database(an Oracle 11 database) I have a attribute which is of Date type but has a time in the value for some reason, idk why it is Date type and not DateTime. When I select this " Position_time" Of course it just displays the date but when i attempt a filter on the column more options are shown of the same date for multiple times so a time value is present in this column even though it is of date type.
Link to picture of position_time context
As seen in the image even though the attribute is of type Date it contains a time "component" This is not shown in the overview btw only when i try to filter the column idk of that matters.
Id like to extract this time from my date. I've seen plenty of posts explaining how to extract from a DateTime column but not from a Date. I cannot change the type of this column. Is there any way to achieve this?
for example
select
format(tr.position_time)
from positions
Do you mean like this :
select to_char(to_date(position_time,'dd-mm-yyyy HH24:MI:SS'),
'HH24:MI:SS') time from positions;
if you already passing the date type as parameter then just use to_char function for extract the time from it.
E.g:
Select to_char(position_time,'HH24:MI:SS') from positions;
You would convert to a string:
select to_char(tr_position_time, 'HH24:MI:SS')
from positions;
In Oracle, date datatype consist of date + time.
It is the NLS setting of your IDE which is displaying the data like this.
If you want to show date and time then use:
select
To_char(tr.position_time,'dd-mon-rrrr hh24:mi:ss')
from positions
Or if you want just time portion then use:
select
To_char(tr.position_time,'hh24:mi:ss')
from positions
If you want to see all the dates in your session with time then alter your session's NLS setting.
ALTER SESSION SET NLS_DATE_FORMAT = 'dd-mon-yyyy hh24:mi:ss';
select
tr.position_time -- formatting is not needed
from positions
In your IDE also, there must be setting to change the NLS setting.
Cheers!!
Related
I am taking an introductory course to databases so I am a complete beginner. In the database I am supposed to create I have two tables, each contain a DATE datatype.
In the first table, I want it to only display a date (DD-MM-YY) and in the second table display a date and time (DD-MM-YY HH24:MM).
How can I format each attribute to have these respective formats? I've looked around and tried the following command:
ALTER SESSION SET nls_date_format = 'YYYY-MM-DD HH24:MI:SS'
Which works nicely for the date and time field but leaves 00:00:00 for the date only field. Which I do not want, so I reverted it back to nls_date_format = 'DD-MM-YY'
As of right now the following:
INSERT INTO ITEM (ITEM_ENDDATEANDTIME)
VALUES ('13-AUG-13 23:56:00');
Gives me the error: date format picture ends before converting entire input string
Any ideas? Again, I'm a beginner a lot of this is new to me! Thanks!
What you want to do is always store your date values as dates. Data manipulation is infinitely easier when you have stored them in this format instead of in a text based format.
Then, you output them into a more human readable format through a query using syntax similar to this:
SELECT DateField,
TO_CHAR(DateField, 'YYYY-MM-DD HH24:MI:SS') AS Date1,
TO_CHAR(Datefield, 'DD-MM-YY') AS Date2
FROM MyTable
This takes the date data and outputs it as a formatted string. I hope this helps.
SELECT to_date(to_char(SYSTIMESTAMP, 'MM/DD/YYYY'), 'MM/DD/YYYY') FROM DUAL;
==> 04-MAR-16
Can anybody explain why this select statement doesn't result in '03/04/2016'?
How can I write my selection so that it does result in this, as a date type? I have also tried
SELECT to_date(to_char(trunc(SYSTIMESTAMP), 'MM/DD/YYYY'), 'MM/DD/YYYY') FROM DUAL
with the same result.
When a date is returned by a query and displayed, it obviously needs to be formatted in some way. The way a date-type value is formatted is not determined by the query, but by the tool that executes your query and displays the result.
In the case of SQL developer you can set that format as follows:
Choose menu Tools > Preferences.
In the Preferences dialog, select Database > NLS from the left panel.
From the list of NLS parameters, enter "MM/DD/YYYY"
Save and close
See also this question.
Note that to convert a timestamp to date you need just to truncate it: trunc(SYSTIMESTAMP). Converting it to string and then back to a date is unnecessary.
You are converting a datetime to a string and back to a date. Your system defaults the date format to DD-MMM-YY for output purposes; this is the normal default for date in Oracle.
It is important to understand that the internal data structure for date/time types has nothing to do with how they are presented. So, if you want it in another format, convert to a string using to_char().
If you want to change the default format, then look at NLS_DATE_FORMAT. The documentation is here.
I have a Oracle table where there is one date-time field.
On select query i am able to get all the field values but not timefield value in my .net application.
select abc.Id, abc.Name, abc.When from details abc where abc.Id='"+1234+"'
Could anyone suggest me.
The format of the returned DATE field from Oracle depends upon your default NLS settings in the database.
Oracle stores dates (and times) in an internal representation and when you select the date values you can then format them as you need. An official Oracle explaination is here.
To force the format you can explicitly convert the date to a string representation using:
select abc.Id,
abc.Name,
TO_CHAR(abc.When, 'DD-MON-YYYY HH24:MI:SS') AS when
from details abc
where abc.Id='"+1234+"'
If you are ONLY wanting the time portion of the WHEN column then:
select abc.Id,
abc.Name,
TO_CHAR(abc.When, 'HH24:MI:SS') AS when
from details abc
where abc.Id='"+1234+"'
This will then return it as a string rather than a date and time which may or may not be OK for you depending upon what you then want to do with it.
The format you choose for the date and time could be any of the Oracle date and time formats, see here.
Hope it helps...
There must be a very simple answer, but I can't find it anywhere.
I have the following which is a section of my select statement:
case when q.renewal_date is not null then
to_date(q._renewal_date, 'DD/MM/YYYY')
else
to_date(w.END_DATE, 'DD/MM/YYYY')
end END_DATE,
according to all of the docs I can find the MM should give the month in numbers however I'm getting results such as:
30-SEP-12
26-JUN-11
30-SEP-12
It's also interesting that they're hyphenated (-) and not with slashes (/).
So what's the reason for this and how do I achieve what I want?
Assuming w.end_Date and q._renewal_date are actual dates, you want to to_char them, not to_date. At present I would say you are seeing the dates in the format specified by your NLS settings. (If they are not dates, you are converting them to dates, but still letting your NLS settings choose the format you view it in)
As you are TO_DATEing the value it is stored by Oracle internally as a date. It is displayed back to you using your NLS_DATE settings value which i would assume are set to DD-MON-YY by default.
You can check with
SELECT *
FROM v$parameter
WHERE name = 'nls_date_format';
You'll need to either alter your NLS_DATE_FORMAT setting (either for your session or for the DB) or TO_CHAR the output to the format you want to see.
to_date converts a string to a date. The code you have is taking a string (q._renewal_date) in 'DD/MM/YYYY' format and converting it to a date. What you are seeing is the default rendering of the date field.
Depending on what type q._renewal_date is, you probably need to use a different conversion/formatting function.
I wish to view my column time as 'hh24:mi:ss' but even i insert it as to_date('13:00:00','hh24:mi:ss'). It still displays as date format. I have tried different methods to convert and i don't wish to alter the session.
Here's my table created:
CREATE TABLE Test
(
Name VARCHAR2(20),
Description Varchar2(20),
StudyTime Date,
SleepTime Date,
);
Insert:
INSERT INTO Test
VALUES('JUDY','STUDYING AT ABC', (To_Date('01:00:00', 'HH24:MI:SS')),
(TO_DATE('06:35:00', 'HH:MI:SS')));
Display results:
Judy,Studying at abc,11-Nov-2011,11-Nov-2011
Thanks for anyone help!
Your IDE or SQL*Plus settings are displaying the default date format of DD-Mon-YYYY.
Even though you are entering just a time format, oracle will still see it as a full date and time, hence the 11-Nov-2011 date (you need to be aware of this!).
When you then select all columns whichever interface you are using to display the results will show you the character representation of the date columns, if you have not specified what that is it will use the default NLS format settings.
See: http://www.adp-gmbh.ch/ora/admin/nls_levels.html
Either change the NLS date format settings or specify using TO_CHAR what format you want the results.
Try:
SELECT name,
description,
TO_CHAR(studytime, 'HH24:MI:SS') as studytime,
TO_CHAR(sleeptime, 'HH:MI:SS') as sleeptime
FROM test;
N.B. I used HH24 for studytime and HH for sleeptime as you have done in your example when entering your values.
This should disply it in the correct format.