Date operations in java: how to substract two dates

dear all
I want to substract two date and return the number of days between them
and I want to make a method that return the number of monthes between two dates
please help

Kayaman wrote:
Check out the Calendar class.Hello Kayaman,
From a quick glance at its API, I haven't found it obvious that Calendar could fulfill such need under 10-lines algorithms. As per Joda-time's proponents, it's one of those computation that are unintuitively hard or convoluted using the stock JDK date&time classes.
If you're comfortable with Calendar, maybe you'd find it interesting to voice your opinion in this other topic: {thread:id=1982257}. Thanks in advance.
Hello OP,
apologies for plugging that discussion in your topic. But I do think it's closely related.
I noticed you marked both replies as helpful. I'd like to know your feedback on those replies: have you tried both approaches, and succeed with one, or both? Have you met difficulties with either?
Thanks, and good luck anyway.
J.

Similar Messages

How to substract two date&time values

Well,i just need to substract last visited date&time value from systemdate. The last visited date&time(from the filed named SONBULUNMAZAMANI, ) is selected from table (IHALE_KATILIMCILAR ) in the format DD-MM-RRRR HH24:MI and systemdate is in the same format. And i need to get value in minutes. Then i need to check if the value is greater then 20 minutes, finally i will update database and set IHALE_KATILIMCILAR.AKTIF=0. Here is the code i used;
DECLARE
MinDiff number;
DateTime1 ihale_katilimcilar.sonbulunmazamani%TYPE;
BEGIN
select t.sonbulunmazamani into DateTime1 from ihale_katilimcilar t where t.ihlkodu=141 and t.ihlaltktgkodu=132 and t.id_iliski=193;
MinDiff := ABS( TO_DATE( TO_CHAR(SYSDATE, 'DD-MM-RRRR') || TO_CHAR(SYSDATE , 'HH24:MI'), 'DD-MM-RRRR HH24:MI' ) - TO_DATE( TO_CHAR(DateTime1, 'DD-MM-RRRR') || TO_CHAR(DateTime1, 'HH24:MI'), 'DD-MM-RRRR HH24:MI' ) );
DBMS_OUTPUT.PUT_LINE('Difference is ' || MinDiff);
END;
However the result i get is always pointed values such as ,1895833333333333333333333333333333333333. How can i handle this?
And here is the scripts of table:
create table IHALE_KATILIMCILAR
KULADI VARCHAR2(20),
SONUC NUMBER(1),
AKTIF NUMBER(1) default 1,
SRKTKODU VARCHAR2(10) not null,
SONBULUNMAZAMANI DATE default sysdate,
SIRA NUMBER(1) default 0,
MESAJ VARCHAR2(200),
ID NUMBER(6) not null,
IHLKODU NUMBER not null,
IHLALTKTGKODU VARCHAR2(10) not null,
ID_ILISKI NUMBER,
IHLSIRA NUMBER(1) default 0,
CEVAP VARCHAR2(200)
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('asd', null, 1, '4444', to_date('19-02-2008 10:29:44', 'dd-mm-yyyy hh24:mi:ss'), 0, 'süre talep 2', 76, 145,
'135', 345, 0, 'al sna süre 77');
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('asd', null, 1, '4444', to_date('20-02-2008 14:49:52', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 77, 145, '135',
345, 0, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('asd', null, 1, '4444', to_date('19-02-2008 10:29:44', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 78, 145, '135',
345, 0, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('asd', null, 1, '4444', to_date('19-02-2008 10:29:44', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 79, 145, '135',
345, 0, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KEMMM', null, 0, '42', to_date('17-03-2008 09:29:20', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 63, 141, '134',
191, 0, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('MLK', null, 1, '46', to_date('07-03-2008 09:52:20', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 64, 141, '134', 192,
0, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KEM.ESM', null, 1, '44', to_date('06-03-2008 13:28:50', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 61, 145, '135',
189, 0, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KE.ES', null, 1, '45', to_date('07-03-2008 11:16:41', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 69, 141, '133',
197, 0, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KEMMM', null, 0, '42', to_date('17-03-2008 09:29:20', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 65, 141, '132',
193, 1, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KE.ES', null, 1, '45', to_date('07-03-2008 11:16:41', 'dd-mm-yyyy hh24:mi:ss'), 2, null, 66, 141, '132',
194, 1, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('MLK', null, 1, '46', to_date('07-03-2008 09:52:20', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 67, 141, '132', 195,
1, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KEMMM', null, 0, '42', to_date('17-03-2008 09:29:20', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 68, 141, '133',
196, 0, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KEM.ESM', null, 1, '44', to_date('12-03-2008 15:00:58', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 70, 142, '252',
198, 1, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KE.ES', null, 1, '45', to_date('10-03-2008 10:08:17', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 71, 142, '252',
199, 1, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KEM.ESM', null, 1, '44', to_date('10-03-2008 10:08:56', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 72, 143, '253',
200, 1, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('MLK', null, 1, '46', to_date('12-02-2008 13:34:40', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 73, 143, '253', 201,
1, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KE.ES', null, 1, '45', to_date('06-03-2008 14:09:40', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 60, 145, '136',
188, 1, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KEM.ESM', null, 1, '44', to_date('06-03-2008 13:28:50', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 74, 145, '136',
202, 1, null);
insert into IHALE_KATILIMCILAR (KULADI, SONUC, AKTIF, SRKTKODU, SONBULUNMAZAMANI, SIRA, MESAJ, ID, IHLKODU,
IHLALTKTGKODU, ID_ILISKI, IHLSIRA, CEVAP)
values ('KE.ES', null, 1, '45', to_date('06-03-2008 14:09:40', 'dd-mm-yyyy hh24:mi:ss'), 0, null, 75, 145, '135',
203, 0, null);
Thanks...

What version of SQLServer do you have? Datediff is not an Oracle built-in function.
OP:
THe difference between two dates in Oracle is in days. The decimal portion refers to partial days, so you need to convert that to the required precision. Also, both sysdate and your column are date type, and contain a time portion, so you do not need all the to_date/to_char stuff. Something like:
SQL> SELECT end_dt, start_dt, (end_dt - start_dt) * 24*60 diff
2 FROM (SELECT sysdate end_dt, TRUNC(sysdate) start_dt
3        FROM dual);
END_DT             START_DT                 DIFF
17-mar-08 10:39:39 17-mar-08 00:00:00     639.65John

How to Compare two Dates in java

How to Compare two Date Field after getting the values from jTextField1.getText() and jTextField2.getText().

Date d1=DateFormat.getDateInstance().parse(yourstring1);
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How to substract two "HH:MM" varchar's

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Varchar1 --- 12:30
Varchar2 --- 10:40
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how to substract two Varchars?

... and ... if you know the two times are supposed to be on the same day, but you're not sure which is the larger of the two you could do this to ensure you always get a positive answer...
SQL> ed
Wrote file afiedt.buf
1 with table_x as (select '12:30' as v1, '10:40' as v2 from dual)
2 --
3 -- END OF TEST DATA
4 --
5 SELECT     TO_CHAR(TRUNC(SYSDATE) +
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7                    LEAST(TO_DATE (v1, 'HH24:MI'),TO_DATE (v2, 'HH24:MI'))
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9* FROM       table_x
SQL> /
DIFF
01:50
SQL> ed
Wrote file afiedt.buf
1 with table_x as (select '10:40' as v1, '12:30' as v2 from dual)
2 --
3 -- END OF TEST DATA
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5 SELECT     TO_CHAR(TRUNC(SYSDATE) +
6                   (GREATEST(TO_DATE (v1, 'HH24:MI'),TO_DATE (v2, 'HH24:MI')) -
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[*Google* JavaScript Forum|http://www.google.co.uk/search?q=JavaScript+Forum&ie=utf-8&oe=utf-8&aq=t&rls=org.mozilla:en-GB:official&client=firefox-a]
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How to compare two dates to know which one is greater than oher?

how to compare two dates to know which one is greater than oher?
Please search before asking basic questions.
Edited by: Rob Burbank on Mar 27, 2009 9:26 AM

Hi,
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regards,
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Dear all,
Need your inputs on the following problem statement...
Existing Functionality:
We have two data blocks A (Parent) and B (Child) in a relationship. Both data blocks refer to different tables.
Data block A is the query data block and for a single record in block A we can have multiple records in block B. Multiple records in block B are shown one at a time after executing a query, this is implemented by using a list item C (belongs to a third block).
For example
Let us say block B can have 5 different types of entries for each record in block A. In this case the list item C will have 5 values corresponding to these entries. Once the query is executed, block B will show the default entry for the queried record in block A. To see other entries for the record user can select the required value in list item C and corresponding entry in block B will be fetched.
Requirement:
Our requirement now is to enable querying upon both data blocks A and B simultaneously. To implement this I replaced data blocks A and B with a single data block X which is based on the join of the two tables referred by the Data blocks A and B earlier. As the fields should allow insert, update, delete operations we did not use a view here.
Issue:
Now the problem is, each record in block A for which block B had multiple entries earlier is now getting listed multiple times because of the join.
I have tried but could not find any solution for this. I would appreciate if any of you can suggest how we can query both blocks simultaneously without affecting the existing functionality.
Thanks,
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I don't understand your requirement in detail. I try to repeat what i understood so far.
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I am working in oracle form developer 6i and database 10g.
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manjit84 wrote:
Has anyone used the Calendar.before() method for comparing two dates, Yes.
how accurate is this?I've never noticed a problem.
Some users have found problem with this method, is this true?Check the bug database^1^?
^1^ http://bugs.sun.com/

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First of all,
Hello to All, i am new to Oracle DB, but i have little experience in Other Database such as Sybase, sql server etc
please kindly help me
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Dr. KindaEmesko, 20678, Replace OutCard, BED, 9 days 21 hours 52 minutes
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Well, instead of all these suggested manipulations you can simply use intervals. Oracle uses day as a unit in date arithmetic, so Dischargedate-Admit Date is number od days between two dates. Built-in function numtodsinterval can be used to convert it into interval. For example:
SQL> with t as (
2             select trunc(sysdate) - 2 Admit_Date,
3                    sysdate            Discharge_Date
4               from dual
5            )
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7    from t
8 /
HOSPITAL_STAY
+000000002 00:01:08.000000000
SQL> SY.

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I would like to know how I can use two Multifunction Boards simultaneously? For example, I had two NI6024 boards and I would like to use 16/DI channels. I want to syncronize them. Thank you.

Youngkey,
You can synchronize the two data acquisition boards, by using the RTSI bus that is part of the architecture of the boards. I am attaching the text of a Knowledge Base which describes how to accomplish this goal:
Title:
Synchronizing data acquisition between two or more MIO-16 series boards
Problem:
How can I synchronize data acquisition between two or more MIO-16 series boards?
Solution:
First, place a special Real-Time System Integration (RTSI) cable on the RTSI connector. Then, determine what trigger pulse signals need to transmitted to the trigger inputs of each MIO-16 series board. The board which sends the trigger signal becomes a 'master' and the board that rec
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Hope this information is helpful.
L Aguila
Applications Engineer
National Instruments

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Hi Every One,
I have Fields like Start Date,New Date, Close Date, End date balance.
that Fields all are in date format like start date(05/05/14), New date(06/05/14),Close date(09/05/14)
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Hi Stefen Jay,
For suppose, let us assume you have START DATE, NEW DATE and CLOSE DATE as mentioned below.
And please make sure that all START DATE, END DATE, NEW DATE are in same format.(MM/dd/yyyy)
Now first you need to add start date and new date. Create a variable
Start Date & New Date = RelativeDate([Start Date];DayNumberOfMonth([New Date])) // Gives 5/11/14 as result.
And now subtract Close Date from the above result using this formula.
End Date = RelativeDate([Start Date & New Date];-DayNumberOfMonth([Close Date])) //Gives 5/2/14 as result.
Find below screenshot for reference.
Regards,
G Sujitha

How to calculate two date diff?

what is the similar function in BIEE? like datediff = date1 - date2 SQL statment in Oracle db,
i have tried to use minus, it was not works, BIEE does not support minus two date directly?
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you can use timestampdiff function. The TimestampDiff function returns the total number of specified intervals between two timestamps.
Syntax:
TimestampDiff (interval, timestamp-expression1, timestamp-expression2)
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The specified interval. Valid values are:
SQL_TSI_SECOND
SQL_TSI_MINUTE
SQL_TSI_HOUR
SQL_TSI_DAY
SQL_TSI_WEEK
SQL_TSI_MONTH
SQL_TSI_QUARTER
SQL_TSI_YEAR

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Is there a way to get this to work as a function?
Currently returns error "Select statements included within a function cannot return data to a client"
CREATE FUNCTION [dbo].[WorkDays](@DateFrom datetime,@DateTo datetime)
RETURNS int
AS
BEGIN
--Working time
DECLARE @WTFrom TIME = '8:00AM';
DECLARE @WTTo TIME = '5:00PM';
DECLARE @minCount BIGINT
--Date ranges
IF (DATEDIFF(HOUR, @DateFrom, @DateTo) > 12)
BEGIN
WITH CTE AS
SELECT @DateFrom AS DateVal
UNION ALL
SELECT DATEADD(HOUR, 1, DateVal)
FROM CTE
WHERE DateVal < DATEADD(HOUR, -1,@DateTo)
SELECT DATEDIFF(minute, MIN(CTE.DateVal), MAX(CTE.DateVal))
FROM CTE
WHERE (CAST(CTE.DateVal AS time) > @WTFrom AND CAST(CTE.DateVal AS time) < @WTTo) AND DATEPART(dw, CTE.DateVal) NOT IN (1, 7) AND NOT EXISTS (SELECT * FROM Holiday AS H WHERE H.holiday = CTE.DateVal)
OPTION (MAXRECURSION 0);
END;
ELSE
BEGIN
WITH CTE AS
SELECT @DateFrom AS DateVal
UNION ALL
SELECT DATEADD(MINUTE, 1, DateVal)
FROM CTE
WHERE DateVal < DATEADD(MINUTE, -1,@DateTo)
SELECT DATEDIFF(minute, MIN(CTE.DateVal), MAX(CTE.DateVal))
FROM CTE
WHERE (CAST(CTE.DateVal AS time) > @WTFrom AND CAST(CTE.DateVal AS time) < @WTTo) AND DATEPART(dw, CTE.DateVal) NOT IN (1, 7) AND NOT EXISTS (SELECT * FROM Holiday AS H WHERE H.holiday = CTE.DateVal)
OPTION (MAXRECURSION 0);
END;
END
Thanks for your help.

Please post DDL, so that people do not have to guess what the keys, constraints, Declarative Referential Integrity, data types, etc. in your schema are. Learn how to follow ISO-11179 data element naming conventions and formatting rules (you do not). Temporal
data should use ISO-8601 formats (you do not!). Code should be in Standard SQL as much as possible and not local dialect.
This is minimal polite behavior on SQL forums.
We hate functions in SQL. This is a declarative language and you are using it like 1950's FORTRAN. We hate local variables (more FORTRAN!)
The name of a function has to be either a known, common name, like “sine”, “cosine” etc. Or it is “<verb>_<object>”; you think a noun is a verb! Do you really need BIGINT? Why did you invite garbage data with it? Why do you think that SQL
uses AM/PM? Have you never seen the TIME data type?
Think about “date_val” as a data element name. A date is a unit of temporal measurement on a calendar scale. This would be a “<something>_date” in a valid schema.
>> Is there a way to get this to work as a function? <<
Probably, but why do it wrong?
Build a calendar table with one column for the calendar data and other columns to show whatever your business needs in the way of temporal information. Do not try to calculate holidays in SQL -- Easter alone requires too much math.
The julian_business_nbr is how SQL people do this. Here is the skeleton.
CREATE TABLE Calendar
(cal_date DATE NOT NULL PRIMARY KEY,
julian_business_nbr INTEGER NOT NULL,
Here is how it works:
INSERT INTO Calendar
VALUES ('2007-04-05', 42),
('2007-04-06', 43), -- Good Friday
('2007-04-07', 43),
('2007-04-08', 43), -- Easter Sunday
('2007-04-09', 44),
('2007-04-10', 45); --Tuesday
To compute the business days from Thursday of this sample week to next Tuesday:
SELECT (C2.julian_business_nbr - C1.julian_business_nbr)
FROM Calendar AS C1, Calendar AS C2
WHERE C1.cal_date = '2007-04-05',
AND C2.cal_date = '2007-04-10';
See how simple it can be when you stop trying to write FORTRAN and think in sets?
--CELKO-- Books in Celko Series for Morgan-Kaufmann Publishing: Analytics and OLAP in SQL / Data and Databases: Concepts in Practice Data / Measurements and Standards in SQL SQL for Smarties / SQL Programming Style / SQL Puzzles and Answers / Thinking
in Sets / Trees and Hierarchies in SQL

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