Can't seem to fix this. Been trying to get it to work for the past hour. any help would be appreciated.
INFO: Server startup in 868 ms
java.sql.SQLException: Can not issue data manipulation statements with executeQuery().Event{id=0, name='dads', venue='dasd', startDate='11/11/11', endDate='12/11/11'}
Seemed to be getting an error when I try to do an insert.
public void addEvent(Event event) throws DaoException{
Connection con = null;
PreparedStatement ps = null;
ResultSet rs = null;
try {
con = this.getConnection();
String query = "INSERT INTO TABLE EVENT VALUES(null, ?, ?, ?, ?)";
ps = con.prepareStatement(query);
ps.setString(1, event.getName());
ps.setString(2, event.getVenue());
ps.setString(3, event.getStartDate());
ps.setString(4, event.getEndDate());
rs = ps.executeQuery();
}catch(SQLException e) {
System.out.println(event.toString());
e.printStackTrace();
}finally {
try {
if (rs != null) {
rs.close();
}
if (ps != null) {
ps.close();
}
if (con != null) {
freeConnection(con);
}
} catch (SQLException e) {
throw new DaoException("Couldn't " + e.getMessage());
}
}
}
for inserting or updating or deleting you should use executeUpdate()
executeUpdate() returns int value
so replace this line rs = ps.executeQuery(); with
int result = ps.executeUpdate();
Note you will get another error after modifying as per above because you sql query is also wrong
Use the following query
INSERT INTO EVENT VALUES(null, ?, ?, ?, ?)
it looks like incorrect syntax of INSERT Query, update it likewise
INSERT INTO EVENT VALUES(null, ?, ?, ?, ?) // remove TABLE word
//INSERT INTO TABLE_NAME VALUES(...) , this is correct syntax.
also correct here too
executeUpdate() instead of executeQuery()
// for insert/update/delete query always use executeUpdate(),
// for select query use executeQuery()
Related
public void insertTags(Elements[] elements) {
Connection con = (Connection) DbConnection.getConnection();
try {
String sql = "insert into htmltags(source) values(?),(?),(?)";
PreparedStatement ps = (PreparedStatement) con.prepareStatement(sql);
ps.setString(1, elements[0].toString());
ps.setString(2, elements[1].toString());
ps.setString(3, elements[2].toString());
int rs = ps.executeUpdate(sql);
System.out.println("Data inserted" + rs);
} catch (SQLException e) {
e.printStackTrace();
}
}
is this a valid syntax for Prepared statement.
This is your problem:
int rs = ps.executeUpdate(sql);
From the JavaDoc we see that PreparedStatement#executeUpdate() does not take any parameters. The reason is that we already passed the query earlier when preparing the statement. Your code should be this:
int rs = ps.executeUpdate(); // no parameter
Also no need to cast the result of prepareStatement to PrepareStatement
To insert multiple values, I don't thing using values(?),(?),(?) is the right syntax, instead use a loop, or for better way you can use batch :
String sql = "insert into htmltags(source) values(?)";
try (PreparedStatement ps = con.prepareStatement(sql);) {
for (Elements element : elements) {
ps.setString(1, element.toString());
ps.addBatch();//Add a new batch for each Element
}
int[] result = ps.executeBatch();//Submits a batch of commands to the database
} catch (SQLException e) {
e.printStackTrace();
}
I don't know what is wrong with my code below.
try {
String sql = "INSERT INTO `myporject`.`selectnation` (`nations` ,`package` ,`persons`) "
+ "VALUES ('?', ?, ?)";
PreparedStatement ps = connect.prepareStatement(sql);
if (ps.executeUpdate() != -1) {
ps.setString(1,"Japan" );
ps.setInt(2, this.pack);
ps.setString(3, jTextField1.getText());
And this is StackTrace
java.sql.SQLException: No value specified for parameter 1
You are trying to execute the prepareStatement before setting the parameters, so you need to change your code as follows:
PreparedStatement ps = connect.prepareStatement(sql);
//set the parameters first
ps.setString(1,"Japan" );
ps.setInt(2, this.pack);
ps.setString(3, jTextField1.getText());
//now execute the prepared statement
if (ps.executeUpdate() != -1) {
//add your code
}
I suggest you refer here to understand the jdbc concepts.
I'm having an issue with adding data to a sql database through Java on Netbeans.
String bladeSerial;
String bladeType;
LocalTime startTime1;
private void startButton2ActionPerformed(java.awt.event.ActionEvent evt) {
Connection conn = null;
Statement st = null;
try {
conn = DriverManager.getConnection ("jdbc:derby://localhost:1527/db01", "Administrator", "admin"); //run procedure getConnection to connect to the database - see below
st = conn.createStatement(); //set up a statement st to enable you to send SQL statements to the database.
} catch (SQLException ex) {
Logger.getLogger(FormTwo1.class.getName()).log(Level.SEVERE, null, ex);
}
System.out.println ("Successful Connection");
String query = "insert into TB01(SERIAL,BLADETYPE,STARTT1) values ('+bladeSerial+', '+itemText+', '+(String.valueOf(startTime1))+')";
try (PreparedStatement pstmt = conn.prepareStatement(query)) {
pstmt.setString(1, bladeSerial);
pstmt.setString(2, bladeType);
pstmt.setString(3, String.valueOf(startTime1));
pstmt.executeUpdate();
} catch (SQLException ex) {
Logger.getLogger(FormTwo1.class.getName()).log(Level.SEVERE, null, ex);
}
I get the error The column position '1' is out of range. The number of columns for this ResultSet is '0'.
In the database, Serial is VARCHAR(5), Bladetype is VARCHAR(80)and StartT1 is VARCHAR(12)
The startTime1 variable is saved in the format HH:mm:ss.SSS.
I appreciate any help on this error
You need to give placeholder in your query. Change your code as given here...
String query = "insert into TB01(SERIAL,BLADETYPE,STARTT1) values (?, ?, ?)";
PreparedStatement pstmt = conn.prepareStatement(query);
pstmt.setString(1, bladeSerial);
pstmt.setString(2, bladeType);
pstmt.setString(3, String.valueOf(startTime1));
pstmt.executeUpdate();
You don't need to give column names in query when you are using Prepared statement. Do the following changes:
String query = "insert into TB01(SERIAL,BLADETYPE,STARTT1) values (?, ?, ?)";
Hope it helps!!
Here you are forming query like simple statement and used it in prepared statement which is not possible, so change your query with place holder like below.
String query = "insert into TB01(SERIAL,BLADETYPE,STARTT1) values (?, ?, ?)";
PreparedStatement pstmt = conn.prepareStatement(query);
pstmt.setString(1, bladeSerial);
pstmt.setString(2, bladeType);
pstmt.setString(3, String.valueOf(startTime1));
pstmt.executeUpdate();
If you want to directly use variables names like bladeSerial, then you should use these String variables as if you're adding multiple Strings.
String query = "insert into TB01(SERIAL,BLADETYPE,STARTT1) values ("+bladeSerial+", "+itemText+", "+(String.valueOf(startTime1))+")";
But this is strictly not recommended as it would introduce serious security issues.
The recommended way is to use PreparedStatement. The query you've written is correct, it's just that you have to use placeholders instead of variable names.
String query = "insert into TB01(SERIAL,BLADETYPE,STARTT1) values (?, ?, ?)";
try (PreparedStatement pstmt = conn.prepareStatement(query)) {
pstmt.setString(1, bladeSerial);
pstmt.setString(2, bladeType);
pstmt.setString(3, String.valueOf(startTime1));
pstmt.executeUpdate();
} catch (SQLException ex) {
// Exception handling
Logger.getLogger(FormTwo1.class.getName()).log(Level.SEVERE, null, ex);
}
I tried to save / edit / delete a new row in the database. writing in the gui values to be saved with getText ()
here is the code
Connection conn = Connessione.ConnecrDb();
Statement stmt = null;
ResultSet emps = null;
try{
String sql;
sql = "INSERT INTO PROGETTO.LIBRO (ISBN, DISPONIBILITA, TITOLO, CASA_EDITRICE, CODICE_AUTORE, GENERE, PREZZO)"
+ "VALUES (txt_isbn, txt_disp, txt_titolo, txt_casa, txt_autore, txt_genere, txt_prezzo)";
stmt = conn.createStatement();
emps = stmt.executeQuery(sql);
String ISBN= txt_isbn.getText();
String DISPONIBILITA= txt_disp.getText();
String TITOLO= txt_titolo.getText();
String CASA_EDITRICE= txt_casa.getText();
String CODICE_AUTORE= txt_autore.getText();
String GENERE= txt_genere.getText();
String PREZZO = txt_prezzo.getText();
JOptionPane.showMessageDialog(null, "SALVATO");
}catch(SQLException | HeadlessException e)
{
JOptionPane.showMessageDialog(null, e);
}
finally
{
try{
if (emps != null)
emps.close();
}
catch (SQLException e) { }
try
{
if (stmt != null)
stmt.close();
}
catch (SQLException e) { }
}
Getting this error: column not allowed here
Above code just takes care of insert operation. How can I delete and modify table record?
You have asked 2 different questions here
1. Column not allowed here
This happened because you have not passed values for any of parameter into insert statement.
I am not sure about your requirement however I will use PreparedStatement for this scenario.
Example
String insertTableSQL = "INSERT INTO DBUSER"
+ "(USER_ID, USERNAME, CREATED_BY, CREATED_DATE) VALUES"
+ "(?,?,?,?)";
PreparedStatement preparedStatement = dbConnection.prepareStatement(insertTableSQL);
preparedStatement.setInt(1, 11);
preparedStatement.setString(2, "MindPeace");
preparedStatement.setString(3, "system");
preparedStatement.setTimestamp(4, getCurrentTimeStamp());
preparedStatement .executeUpdate();
2. This code is only to save the data, delete, and modify an entire row how can I do?
Answer is very simple. You have to write code for the same :)
You need 3 SQL statement which has DELETE and UPDATE operation just like insert in above example.
String sql = "INSERT INTO PROGETTO.LIBRO (ISBN, DISPONIBILITA, TITOLO, "
+ "CASA_EDITRICE, CODICE_AUTORE, GENERE, PREZZO)"
+ "VALUES (?, ?, ?, ?, ?, ?, ?)";
try (PreparedStatement stmt = conn.createStatement()) {
NumberFormat numberFormat = NumberFormat.getInstance(Locale.ITALY);
String ISBN = txt_isbn.getText();
String DISPONIBILITA = txt_disp.getText();
String TITOLO = txt_titolo.getText();
String CASA_EDITRICE = txt_casa.getText();
String CODICE_AUTORE = txt_autore.getText();
String GENERE = txt_genere.getText();
BigDecimal PREZZO = new BigDecimal(
numberFormat.parse(txt_prezzo.getText()).doubleValue())
.setScale(2);
stmt.setString(1, ISBN);
stmt.setString(2, DISPONIBILITA);
stmt.setString(3, TITOLO);
stmt.setString(4, CASA_EDITRICE);
stmt.setString(5, CODICE_AUTORE);
stmt.setString(6, GENERE);
stmt.setBigDecimal(7, PREZZO);
int updateCount = stmt.executeUpdate();
JOptionPane.showMessageDialog(null, "SALVATO");
} catch(SQLException | HeadlessException e) {
JOptionPane.showMessageDialog(null, e);
}
Try-with-resources closes the stmt automatically.
The prepared statement replaces the value in the SQL with something like:
INSERT INTO table(column1, colum2, ....)
VALUES('De\'l Rey',
1234.50,
...)
for:
"De'l Rey"
1.234,50
updateCount should be 1 on success.
Wooow..true!!
I created three buttons to delete / update / insert and now it all works and automatically updates the tables.
you've been very very great. Thank you very much.
one last thing.
if I wanted to insert an error message when I delete / update etc "book not found" I tried to create an if:
Boolean found = false;
try{
sql= delete......
etc
if (!found)
JOptionPane.showMessageDialog(null, "NOT FOUND","ERRORE",JOptionPane.WARNING_MESSAGE);
etc...
Connection conn = Connessione.ConnecrDb();
Statement stmt = null;
ResultSet emps = null;
try{
String sql= "DELETE FROM progetto.libro WHERE isbn =?"; /
pst=(OraclePreparedStatement) conn.prepareStatement(sql);
pst.setString (1, txt_isbn.getText());
pst.execute();
JOptionPane.showMessageDialog(null, "ELIMINATO");
Update_table();
txt_isbn.setText("");
txt_disp.setText("");
txt_titolo.setText("");
txt_casa.setText("");
txt_autore.setText("");
txt_genere.setText("");
txt_prezzo.setText("");
}
catch (Exception e)
{
JOptionPane.showMessageDialog(null,e);
}
if you find the book must exit the book removed, or "not found". but as I deployed I always come out "deleted". why?
thanks again
Please give me an idea how to execute statement to DB.
There are 2 tables(sorry for incorrect writing - it is just to give information about columns):
contractors(contractor_id, contractor_name, contract_num)
invoices(contractor_id, invoice_num, invoice_date, invoice_amount)
The 'contractor_id' in 'invoices' is a foreign key for 'contractor_id' in 'contractors'. How to insert in 'invoices'-table the following data: invoice_num, invoice_date, invoice_amount, if I have the 'contractor_name' from 'contractors'-table?
The solution which works is:
public void insertInvoiceDataByContractorName(String contractorsName, String invoiceNum, String date, float amount) {
String contrId = null;
try {
preparedStatement = connection.prepareStatement("SELECT contractor_id FROM contractors WHERE contractor_name=?");
preparedStatement.setString(1, contractorsName);
resultSet = preparedStatement.executeQuery();
while (resultSet.next()) {
contrId = resultSet.getString(1);
}
preparedStatement = connection.prepareStatement("INSERT INTO invoices VALUES(?, ?, ? ,?)");
preparedStatement.setString(1, contrId);
preparedStatement.setString(2, invoiceNum);
preparedStatement.setString(3, date);
preparedStatement.setFloat(4, amount);
preparedStatement.execute();
} catch (SQLException e) {
e.printStackTrace();
} finally {
try {
if (preparedStatement != null) {preparedStatement.close();}
} catch (SQLException e) {
e.printStackTrace();
}
}
}
I don't know how to make it correct and more simpler by using just one statement. Thank you in advance for pieces of advice.
Use
INSERT INTO invoices SELECT contractor_id, ?, ?, ? FROM contractors WHERE contractor_name=?
this will insert 1 row assuming your contractor name is unique