private void btgetinvActionPerformed(java.awt.event.ActionEvent evt) {
if(tf_rmid.getText().length()==11){
JOptionPane.showMessageDialog(null,"REMITTANCE ID IS VALID!");
try {
DBUtil util = new DBUtil();
Connection con = util.getConnection();
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery("select bk_det.rm_id from bk_det inner join bk_rep on bk_det.rm_id = bk_rep.rm_id WHERE rm_id = ?");
String rm = tf_rmid.getText().trim();
stmt.setString(1, ""+(rm));
while(rs.next()){
int i = rs.getString("RM ID");
String fn = rs.getString("First Name");
String ln = rs.getString("Last Name");
String title = rs.getString("Title");
String city = rs.getString("City");
txtFirstName.setText(fn);
txtLastName.setText(ln);
txtTitle.setText(title);
txtCity.setText(city);
}
} catch (Exception ex) {
JOptionPane.showMessageDialog(null, ex.getMessage());
Logger.getLogger(Demo.class.getName()).log(Level.SEVERE, null, ex);
}
}else{
JOptionPane.showMessageDialog(null,"PLEASE ENTER VALID REMITTANCE ID!");
}
}
I am trying to search values from my database using the select statement but when i am trying to get the value for ? for the where option i am getting error i think its a syntax mistake can ny one please help???
Execute with this,
select bk_det.rm_id from bk_det inner join bk_rep
on bk_det.rm_id = bk_rep.rm_id WHERE bk_det.rm_id = ?
Probably you are missing table name in where clause
It appears a bit odd that you are setting the parameter to the Statement AFTER you execute the query.
Also
int i = rs.getString("RM ID");
this does not compile (if rs is a java.sql.ResultSet instance)
Use a prepared Statement:
String query = "select bk_det.rm_id from bk_det inner join bk_rep on bk_det.rm_id = bk_rep.rm_id WHERE rm_id = ?";
try {
PreparedStatement preps = con.prepareStatement(query);
preps.setString(1, ""+(rm));
preps.execute();
...
Related
I am trying to use concat with a Derby database query. But i get syntax error. How can I use concat in Derby?
The below code is for search purpose
public ArrayList <Tablearray>ListUsers(String ValToSearch){
ArrayList <Tablearray> usersList = new ArrayList <Tablearray>();
Statement st;
ResultSet rs;
try {
Connection con = getConnection();
st = con.createStatement();
String searchQuery = "SELECT * FROM ABYP WHERE CONCAT(Id_Search, Tyl, Apothkh, Parathrhseis,Ti) LIKE '%"+ValToSearch+"%'";
//String searchQuery = "SELECT * FROM ABYP WHERE ||CONCAT|| (Id_Search) LIKE '%||"+ValToSearch+"||%'";
//String searchQuery = "SELECT *FROM ABYP where ID_SEARCH =? ";
rs = st.executeQuery(searchQuery);
Tablearray tablearray;
while (rs.next()){
tablearray = new Tablearray (
rs.getString("Id_Search"),
rs.getString("Tyl"),
rs.getString("Apothkh"),
rs.getString("Parathrhseis"),
rs.getString("Ti")
);
usersList.add(tablearray);
}
}catch(Exception ex){
System.out.println(ex.getMessage());
}
return usersList;
}
hi every one i have write program that connect to database i create jTextField and jTable my question is how i can use the jTextField to serch in database and view in jTable the code i try is below
try{
String host = "jdbc:derby://localhost:1527/PROCAT";
String uName = "zain";
String uPass = "zain";
Connection con = DriverManager.getConnection( host, uName, uPass);
String sql = "Select * from ITEMB where ITEM '"+asdf.getText()+"'";
stmt = con.createStatement();
rs = stmt.executeQuery(sql);
while (rs.next()) {
String pr = rs.getString("PRISE");
String it= rs.getString("ITEMNAME");
String itm = rs.getString("ITEM");
String[] data = {pr, it, itm};
tabMode.addRow(data);
double price = Double.parseDouble(rs.getString("prise"));
totalpay = price + totalpay;
++rowCount;
}
}
catch (Exception e) {
//ignore
}
jTextField3.setText(String.valueOf(totalpay));
}
Don't ignore the Exception. How to you expect to debug your SQL if you don't display error messages???
I would guess the problem is you are missing an "=" from your select statement (ie. "ITEM = asdf.getText()").
However, the better way to use SQL is to use a PreparedStatement so you don't have to worry about all the delimiters. So the SQL might be something like:
String sql = "Select * from ITEMB WHERE ITEM = ?";
PreparedStatement stmt = connection.prepareStatement(sql);
stmt.setString( 1, asdf.getText() );
stmt.executeQuery();
stmt.close();
It is much easier to read an maintain.
MysqlDatabase
This is my query to connect to my database.
SELECT naam, kleur, sector, aantalZilverstukken, Spel_naam
FROM speler
WHERE Spel_Naam = ?
I work in the console of netbeans. When I want to show the records of table Speler with the Spel_Naam.
In the console I want to type a primary key of the table Spel and then it shows me the records of the table Speler in the console. How can I do this.
Like WHERE Spel_Naam = ?
The question mark need to be the name that I typed in
Is the select statement correct? I want to type the Spel_Naam in the console and then It must connect to the database and give me the records of table Speler. How can I do this?
public class SpelerMapper
{
private final static String LEES_SPELERS_SQL = "SELECT naam, kleur, sector, aantalZilverstukken, Spel_naam FROM speler WHERE Spel_Naam = ?";
public List<Speler> geefSpelers()
{
List<Speler> spelerLijst = new ArrayList<Speler>();
Statement statement;
Connection connection = PersistentieController.getInstance().getConnection();
try
{
statement = connection.createStatement();
// query database
ResultSet resultSet = statement.executeQuery(LEES_SPELERS_SQL);
while (resultSet.next())
{
String naam = resultSet.getString("naam");
String kleur = resultSet.getString("kleur");
int sector = resultSet.getInt("sector");
int aantalZilverstukken = resultSet.getInt("aantalZilverstukken");
Speler speler = new Speler(naam ,kleur, sector , aantalZilverstukken);
spelerLijst.add(speler);
}
statement.close();
return spelerLijst;
} catch (SQLException e)
{
e.printStackTrace();
}
return null;
}
Use PreparedStatements:
String LEES_SPELERS_SQL = "SELECT ... WHERE Spel_Naam = ?";
PreparedStatement prepStmt = con.prepareStatement(LEES_SPELERS_SQL);
prepStmt.setString(1, naam);
ResultSet rs = prepStmt.executeQuery();
Additional note: while being another option, concatenation of the SQL query is an unsafe way of doing the same task. Refer to this article for more info.
Im trying to use PreparedStatement to my SQLite searches. Statement works fine but Im getting problem with PreparedStatement.
this is my Search method:
public void searchSQL(){
try {
ps = conn.prepareStatement("select * from ?");
ps.setString(1, "clients");
rs = ps.executeQuery();
} catch (SQLException ex) {
ex.printStackTrace();
}
}
but Im getting this error:
java.sql.SQLException: near "?": syntax error at
org.sqlite.DB.throwex(DB.java:288) at
org.sqlite.NestedDB.prepare(NestedDB.java:115) at
org.sqlite.DB.prepare(DB.java:114) at
org.sqlite.PrepStmt.(PrepStmt.java:37) at
org.sqlite.Conn.prepareStatement(Conn.java:231) at
org.sqlite.Conn.prepareStatement(Conn.java:224) at
org.sqlite.Conn.prepareStatement(Conn.java:213)
thx
Columns Parameters can be ? not the table name ;
Your method must look like this :
public void searchSQL()
{
try
{
ps = conn.prepareStatement("select * from clients");
rs = ps.executeQuery();
}
catch (SQLException ex)
{
ex.printStackTrace();
}
}
Here if I do it like this, it's working fine, see this function :
public void displayContentOfTable()
{
java.sql.ResultSet rs = null;
try
{
con = this.getConnection();
java.sql.PreparedStatement pstatement = con.prepareStatement("Select * from LoginInfo");
rs = pstatement.executeQuery();
while (rs.next())
{
String email = rs.getString(1);
String nickName = rs.getString(2);
String password = rs.getString(3);
String loginDate = rs.getString(4);
System.out.println("-----------------------------------");
System.out.println("Email : " + email);
System.out.println("NickName : " + nickName);
System.out.println("Password : " + password);
System.out.println("Login Date : " + loginDate);
System.out.println("-----------------------------------");
}
rs.close(); // Do remember to always close this, once you done
// using it's values.
}
catch(Exception e)
{
e.printStackTrace();
}
}
Make ResultSet a local variable, instead of instance variable (as done on your side). And close it once you are done with it, by writing rs.close() and rs = null.
Passing table names in a prepared statement is not possible.
The method setString is when you want to pass a variable in a where clause, for example:
select * from clients where name = ?
thx for replies guys,,,
now its working fine.
I noticed sql query cant hold ? to columns too.
So, this sql query to PreparedStatement is working:
String sql = "select * from clients where name like ?";
ps = conn.prepareStatement(sql);
ps.setString(1, "a%");
rs = ps.executeQuery();
but, if I try to use column as setString, it doesnt work:
String sql = "select * from clientes where ? like ?";
ps = conn.prepareStatement(sql);
ps.setString(1, "name");
ps.setString(2, "a%"):
rs = ps.executeQuery();
Am I correct? or how can I bypass this?
thx again
I want to get to the value I am finding using the COUNT command of SQL. Normally I enter the column name I want to access into the getInt() getString() method, what do I do in this case when there is no specific column name.
I have used 'AS' in the same manner as is used to alias a table, I am not sure if this is going to work, I would think not.
Statement stmt3 = con.createStatement();
ResultSet rs3 = stmt3.executeQuery("SELECT COUNT(*) FROM "+lastTempTable+") AS count");
while(rs3.next()){
count = rs3.getInt("count");
}
Use aliases:
SELECT COUNT(*) AS total FROM ..
and then
rs3.getInt("total")
The answers provided by Bohzo and Brabster will obviously work, but you could also just use:
rs3.getInt(1);
to get the value in the first, and in your case, only column.
I would expect this query to work with your program:
"SELECT COUNT(*) AS count FROM "+lastTempTable+")"
(You need to alias the column, not the table)
I have done it this way (example):
String query="SELECT count(t1.id) from t1, t2 where t1.id=t2.id and t2.email='"r#r.com"'";
int count=0;
try {
ResultSet rs = DatabaseService.statementDataBase().executeQuery(query);
while(rs.next())
count=rs.getInt(1);
} catch (SQLException e) {
e.printStackTrace();
} finally {
//...
}
<%
try{
Class.forName("com.mysql.cj.jdbc.Driver").newInstance();
Connection con = DriverManager.getConnection("jdbc:mysql://localhost:3306/bala","bala","bala");
if(con == null) System.out.print("not connected");
Statement st = con.createStatement();
String myStatement = "select count(*) as total from locations";
ResultSet rs = st.executeQuery(myStatement);
int num = 0;
while(rs.next()){
num = (rs.getInt(1));
}
}
catch(Exception e){
System.out.println(e);
}
%>
Statement stmt3 = con.createStatement();
ResultSet rs3 = stmt3.executeQuery("SELECT COUNT(*) AS count FROM "+lastTempTable+" ;");
count = rs3.getInt("count");
It's similar to above but you can try like
public Integer count(String tableName) throws CrateException {
String query = String.format("Select count(*) as size from %s", tableName);
try (Statement s = connection.createStatement()) {
try (ResultSet resultSet = queryExecutor.executeQuery(s, query)) {
Preconditions.checkArgument(resultSet.next(), "Result set is empty");
return resultSet.getInt("size");
}
} catch (SQLException e) {
throw new CrateException(e);
}
}
}