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insert java date time into Oracle

Oracle date format on server is MM/DD/YYYY HH24:Mi:SS
I would like to insert a variable which contains a date with timestamp into Oracle date column.
I am getting error while inserting date into Oracle "date column ends before format picture ends".
All I want is append specific timestamp to java string date and insert that string/date format into Oracle database
example:
String incoming_date = request.getParameter("insert_date"); //this comes as a string in dd-mon-yyyy format
formatted_incoming_date = incoming_date + " 00:00:01"; //I want to append time factor to above variable with 00:00:01
insert into testtable values(formatted_incoming_date);

Try this
insert into testtable values(TO_DATE (formatted_incoming_date, 'dd-mon-yyyy hh24:mi:ss);

Why you try to insert date as a string? It seems like there is an implicit conversion from string to date in Oracle. Can java.sql.Date be used instead?
Anyway, as long as date comes in format dd-mon-yyyy you have to convert it either into java.sql.Date object or in proper for Oracle string representation as MM/DD/YYYY HH24:Mi:SS i.e.
incoming date "05-12-2016" string for Oracle "12/05/2016 00:00:00"

How to select by date only if field is a timestamp?

I have a database field timestamp without timezone, that has values like 2015-11-23 14:42:55.278.
Now I want to find database records with just using the date part 2015-11-13.
Is that possible?
Ideally using hibernate and spring.

I'm not sure if is the best way in performace terms, but you may search dates between 2015-11-23 00:00:00.000 and 2015-11-23 23:59:59.999

If you want to fetch only for day 2015-11-13 then you can fetch all records using between keyword and by using timestamp of start of day.
dateField between 2015-11-13:<time_of_beginning_of_day> AND 2015-11-14:<time_of_beginning_of_next_day>
or
dateField between 2015-11-13:<time_of_beginning_of_day> AND 2015-11-13:<time_of_end_of_day>

You can cast the column to a date, e.g:
Postgres specific:
the_timestamp_column::date = date '2015-11-13'
or (standard SQL)
cast(the_timestamp_column as date) = date '2015-11-13'
You can also "reduce" the timestamp to different levels using date_trunc()
http://www.postgresql.org/docs/current/static/functions-datetime.html#FUNCTIONS-DATETIME-TRUNC

Comparing to get seconds difference between java and mysql datetime

I read a mysql date time field into one string e.g.
String arriveTime = rs1.getString("arriveTime");
Next step I try to get the current date and time using java to be similar format like the one I got from mysql.
DateFormat outDf=new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
String currentDateTimer=null;
Date date = Calendar.getInstance().getTime();
currentDateTimer=outDf.format(date);
How can I minus the currentDateTime and arriveTime to get the net results in seconds. I would prefer to do it purely via java

First, I would not read a MySQL date-time into a String. I would change this,
String arriveTime = rs1.getString("arriveTime");
to
java.sql.Date arriveTime = rs1.getDate("arriveTime");
Then you can use basic subtraction to get the result in milliseconds, then divide by a thousand to get that in seconds - so
long diff = new java.util.Date().getTime() - arriveTime.getTime();
System.out.println(diff / 1000);

I read a mysql date time field into one string
If the column is varchar type it is ok you can read it using resultsetObject.getString()
But if your column type is Date then is it always recommended to get the value using resultset.getDate()
Mysql stores date in the format yyyy-MM-dd
I try to get the current date and time using java to be similar format
like the one I got from mysql.
When you do resultset.getDate() it will give you the java.sql.Date in format yyyy-MM-dd

Java: Insert into a table datetime data

I am trying to insert into a variable in MS- SQL database the current date and the time.
I use this format:
DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss.SSS");
Calendar cal = Calendar.getInstance();
System.out.println(dateFormat.format(cal.getTime()));
and I get this as a result 2013-01-28 09:29:37.941
My field in the database is defined datetime and as I have seen in other tables which have the same field, the date and the time is written exactly like this 2011-07-05 14:18:33.000.
I try to insert into the database with a query that I do inside a java program, but I get this error
SQL Exception: State : S0003 Message: The conversion of a varchar
data type to a datetime data type of the value is out of range. Error
: 242
My query is like that:
query = "INSERT INTO Companies CreatedOn"+
"VALUES ('" + dateFormat.format(cal.getTime()) + "')"
but I don't understand what I am doing wrong.

According to the error description, you are inserting an incorrect type into the database. See JDBC to MSSQL. You should convert Calendar to Timestamp.
Try using:
PrepareStatement statement
= connection.prepareStatement("INSERT INTO Companies CreatedOn VALUES(?)");
java.sql.Timestamp timestamp = new java.sql.Timestamp(cal.getTimeInMillis());
statement.setTimestamp(1, timstamp);
int insertedRecordsCount = statement.executeUpdate();

First of all, do NOT use string concatenation. Have you ever heart about SQL injection?
Correct way how to do that is to use prepared statement:
Idea is you define statement with placeholders and than you define value for those placeholders.
See #Taky's answer for more details.

dateFormat#format this method returns formatted string not Date object. Database field is DateTime and it is expecting java.sql.Timestamp to be inserted there not String according to docs.
To conform with the definition of SQL DATE, the millisecond values
wrapped by a java.sql.Date instance must be 'normalized' by setting
the hours, minutes, seconds, and milliseconds to zero in the
particular time zone with which the instance is associated.
Try java.sql.Timestamp object instead of String in query and I'd recommend you to use PreparedStatement.

This is because you are trying to save String date value to Date type DB field.
convert it to Data dataType
You can also use the datetime "unseparated" format yyyymmdd hh:mm:ss

You could use Joda framework to work with date/time.
It maps own date/time types to Hibernate/SQL types without problem.
When you set parameters in HQL query joda carries about right type mapping.

If you want to store current date and time then you should use MYSQL inbuilt method NOW().
for brief documentation refer http://dev.mysql.com/doc/refman/5.5/en/date-and-time-functions.html . so your code will be like.
INSERT INTO Companies CreatedOn VALUES(NOW())"
However If you want to do it using java Date-util then it should be
Calendar cal = Calendar.getInstance();
java.sql.Timestamp timestamp = new Timestamp(cal.getTimeInMillis());

java.sql.timestamp versus date

I am using Derby database with Java and Eclipse. I have a table which has a TIMESTAMP field and I use a model to populate a JTable from it. I am finding timestamp and data and java.sql and java.utils very confusing. The following line of code errors with cannot cast date to timestamp. mod is the model interfacing Derby table and JTable.
int rowcount = mod.getRowCount();
java.sql.Timestamp ts = (java.sql.Timestamp) mod.getValueAt(rowcount-1,1);
My objective is to get the date of the most recent record and subtract 30 days then run an sql query on the same database to find all the records more recent than that date. How do I recover the first timestamp, subtract the 30 days, then construct a query with the result of the subtraction as the condition in a WHERE clause. Sounds simple but I am having such difficulty that I feel I must be missing some fundamental principal. I thought conversion to long and back again might be the route but came up against the same cast problem.

Timestamp is declared as
public class Timestamp extends java.util.Date { ... }
Therefore you can't cast date to timstamp, you could create a timestamp from a date.
Timstamp ts = new Timestamp( date.getTime() );
To subtract 30 days this sequence might be helpful:
Calendar cal = new GregorianCalendar();
cal.setTime( date.getTime() );
cal.add( Calendar.DAY_OF_MONTH, -30 );
Date d30 = cal.getTime();
Anyway I would try to perform this using only SQL.