We Keep Coding

Oracle: convert java date to Oracle date in java program

I have a java program that reads the date as string from an input file and updates the Oracle table, where this date is part of an index fields.
I tried the following options:
a) Reading the data from csv file delimited by ; as String
109920541;2013-01-17 11:48:09;EDWARD ANTHONY;
b) Using SimpleDateFormat convert String to Date in a routine:
java.text.SimpleDateFormat formatter = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
java.util.Date dt = formatter.parse("2013-01-17 11:48:09");
c) Use this date to prepare my sql stmt:
String update_query = "UPDATE "+ tableName +" SET NAME = ? WHERE ID = ? AND DATE_TIME = ?";
java.sql.Connection conn = java.sql.DriverManager.getConnection(dbUrl, dbUser, dbPwd);
java.sql.PreparedStatement pstmt = conn.prepareStatement(update_query);
if (dt not null) {
pstmt.setObject(1, new java.sql.Timestamp(dt.getTime()),java.sql.Types.DATE);
}
pstmt.executeBatch();
d) This does not find the date which is a part of key and so the data is not updated.
In sql developer I use the below query to fetch row:
SELECT * FROM table
WHERE ID = '1099205410'
AND DATE_TIME = TO_DATE('2013-01-17 11:48:09', 'YYYY-MM-DD HH24:MI:SS');
How to convert a java String to Oracle date?
Thanks.

For a single line:
pstmt.setString(1, name);
pstmt.setInt(2 id);
pstmt.setTimeStamp(3, ew java.sql.Timestamp(dt.getTime()));
pstmt.executeUpdate();
If the DATE_TIME value is not always present in the CSV data, simply use a second PreparedStatement; with just 2 parameters.
If you are using a loop reading the lines, do
for ... {
...
pstmt.clearParameters();
pstmt.setString(1, name);
pstmt.setInt(2 id);
pstmt.setTimeStamp(3, new java.sql.Timestamp(dt.getTime()));
pstmt.addBatch();
}
pstmt.executeBatch();
You might consider using the new time APIs.
(UPDATE is for existing records.)

Using a complex sql query to check availability of date/room using JCalendar

I have to check the rooms available during a particular period ie from a starting date to an ending one for a hotel reservation system. To choose a starting and ending date, I used a JCalendar. The problem is that I am getting an error when I am creating the SQL string query and also I don't know how to retrieve the date from the JCalendar to be used in the query.
Below are code snippets of what I have done and where I am stucked.
JCalendar instantiation:
JDateChooser arrival = new JDateChooser();
JDateChooser departure = new JDateChooser();
Query to check for rooms available:
ResultSet rs = null;
Connection conn = null;
Statement stmt = null;
try {
// new com.mysql.jdbc.Driver();
Class.forName("com.mysql.jdbc.Driver").newInstance();
String connectionUrl = "jdbc:mysql://localhost:3306/testing?autoReconnect=true&useSSL=false";
String connectionUser = "root";
String connectionPassword = "admin";
conn = DriverManager.getConnection(connectionUrl, connectionUser,
connectionPassword);
stmt = conn.createStatement();
String query = "select * from testing.room as ro
where ro.room_id not in
(
select re.room_no
from testing.booking as re
where (arrival_date >= "2016-05-24" and departure_date < "2016-05-29")
or (departure_date >= "2016-05-24" and arrival_date < "2016-05-29")
)";
rs = (ResultSet) stmt.executeQuery("");
while (rs.next()) {
System.out.println(rs.getString(1) + " " + rs.getString(2)
+ " " + rs.getString(3)+ " " + rs.getString(4)+ " "+ rs.getString(5));
}
} catch (Exception e) {
e.printStackTrace();
}
I have hardcoded the dates here :
where (arrival_date >= "2016-05-24" and departure_date < "2016-05-29")
or (departure_date >= "2016-05-24" and arrival_date < "2016-05-29")
That's because I don't know how to take the values from the JCalendar to write it there ie should I use PreparedStatements and get the text or something?
And also, I am getting an error with the query ie where I wrote String query= "query" as it says "Insert missing quotes".

You need to make two changes here:
Get the dates from JDateChooser fields (by calling getDate() method on JDateChooser objects).
Use PreparedStatement and set the dates dynamically. Below is an exmple:
JDateChooser arrival = new JDateChooser();
JDateChooser departure = new JDateChooser();
PreparedStatement pStmt = conn.prepareStatement("select * from testing.room where arrival_date >= ? and departure_date < ?");
pStmt.setDate(1, arrival.getDate());
pStmt.setDate(2, departure.getDate());
ResultSet rs = preparedStatement.executeQuery();

java jdbc select from where with string type

I am trying to solve a problem of my code. In the following code, it contains JComboBox which have a list of month. When I click on January, I want to show all the details of that month.
private void jComboBox1_MonthsActionPerformed(java.awt.event.ActionEvent evt) {
String selection = (String)jComboBox1_Months.getSelectedItem();
if(selection.equals("January")){
try{
String sql = "select * from booking where Date = ??/01/??"; //problem
pst = conn.prepareStatement(sql);
rs = pst.executeQuery();
viewBookingTable.setModel(DbUtils.resultSetToTableModel(rs));
} catch(Exception e){
}
}
}
The format for the Date is 12/01/16 in the Database with type CHAR.
Please help. Thank you very much in advance.

Even though I suggest revisiting your aprroach and favor the usage of the java.sql.Date type, you can select the desired rows using a LIKE predicate:
String sql = "SELECT * FROM booking WHERE Date LIKE '%/01/%'";

Yo could do that:
String sql = "select * from booking where SUBSTR(Date,4,2) = "01";

int index = jComboBox1_Months.getSelectedIndex() + 1;
String sql = "SELECT * FROM `booking` WHERE `date` like '%?%';
pst = conn.prepareStatement(sql);
pst.setObject(1, index);
...

Database query issue

Relatively new to using database and for some reason I can't get this 'execute' to work.
statment2.execute("insert into table Value (" + int + "," + date + "," + int + ",'" + string + "')");
The error I get is "missing a comma". The date is designated as dates only in that particular field.
I set it up as follows
Date date = new Date();
date.setMonth(month);
date.setYear(year);
date.setDate(weekStart); //weekStart is always monday
Do I need to use just plain old date or date.toString? I was going to use Calendar but I don't know how to set a DB date using the Calendar object. I didn't see a "gety/m/d" method.
So, is the problem my query or am I improperly using the Date object to set the date in the database?
Edit:
Tried the response, got incorrect format - Expected Date got number.
Tried
sqlDate.valueOf(dateString I created)
sqlDate.toString()
sqlDate
Using a preparedStatement wouldn't fix this would it? I realize it's supposed to be better for security reasons.

First, you should use a PreparedStatement to insert values in your query. This has many advantages including avoiding SQL Injection issues. If you use PreparedStatement, you will be avoid the errors that you are seeing now. Your code using PreparedStatement would something like this:
Connection conn = null;
PreparedStatement pstmt = null;
try {
conn = getConnection();
String query = "insert into table (column1,column2,column3,column4) values(?, ?, ?,?)";
pstmt = conn.prepareStatement(query);
pstmt.setInt(1, 1);
pstmt.setDate(2, sqlDate);
pstmt.setInt(3, 3);
pstmt.setString(3, "test");
pstmt.executeUpdate();
} catch (Exception e) {
//log the error messages log.error(e,e);
//throw the actual exception upstream
} finally {
pstmt.close();
conn.close();
}
I am not sure what you meant by "DB" date. If you are after the sql date object you can convert a java.util.Date object to a java.sql.Date object this way:
java.util.Date date = new java.util.Date();
java.sql.Date sqlDate = new java.sql.Date(date.getTime());

How to obtain sale by date in java?

I am using ms access DB. I need to obtain sale by date.
Here is my table specification:
BILL_NO DATE SALE
1 8/30/2010 1000
2 8/30/2010 2000
3 8/31/2010 3000
4 8/31/2010 2000
If i want the sale for 8/31/2010 it should return 5000.
I have inserted Date values using java.sql.Date object in DB.

Noted should be that DATE is a reserved keyword in MS Access. You need to specify it with braces. Further, you'd like to use SimpleDateFormat to convert a human readable date string to a fullworthy java.util.Date object which you in turn can construct a java.sql.Date with which in turn can be set in the PreparedStatement the usual way.
Here's a kickoff:
String sql = "SELECT SUM(SALE) as TOTAL_SALE FROM tbl WHERE [DATE] = ? GROUP BY [DATE]";
java.util.Date date = new SimpleDateFormat("MM/dd/yyyy").parse("8/31/2010");
Connection connection = null;
PreparedStatement statement = null;
ResultSet resultSet = null;
int totalSale = 0;
try {
connection = database.getConnection();
statement = connection.prepareStatement(sql);
statement.setDate(new java.sql.Date(date.getTime());
resultSet = statement.executeQuery();
if (resultSet.next()) {
totalSale = resultSet.getInt("TOTAL_SALE");
}
} finally {
close(connection, statement, resultSet);
}

select
sum(SALE) as TOTAL_SALE
from
tbl
where
DATE='8/31/2010'
group by
DATE

Select sum(SALE) from [your table name] where Format([DATE],"mm/dd/yyyy")='08/30/2010';