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java oracle jdbc resultset empty but record is available in the table

I'm running java 1.8 connecting to oracle 12c using ojdbc7.jar for jdbc connection.
This is the code that execute to retrieve the data
Class.forName("oracle.jdbc.driver.OracleDriver");
con=DriverManager.getConnection("jdbc:oracle:thin:#" +
ipAddress + ":1521:" + dbname,userName,password);
Statement stmt=con.createStatement();
String query = "select * from table_name";
ResultSet rs = stmt.getResultSet();
while (rs.next()) {
System.out.println(rs.getString(1));
}
but the code is not entering the while loop.
When i try exeuction the same query in DB, I could see the table has 10 entries.
Does anyone know what could be the reason?

try{
Class.forName("oracle.jdbc.driver.OracleDriver");
con=DriverManager.getConnection("jdbc:oracle:thin:#" +
ipAddress + ":1521:" + dbname,userName,password);
Statement stmt = con.createStatement();
String query = "select * from table_name";
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
System.out.println(rs.getString(1));
}
} catch (SQLException e ) {
} finally {
if (stmt != null) { stmt.close(); }
}

Get next ResultSet in JDBC

I have 2 queries and therefore 2 ResultSet's returned from MySQL in Java through createStatement(). The queries are like
SELECT * FROM abc;
SELECT * FROM def;
These queries are run simultaneously in single createStatement() like
CreateConnection();
Statement stat = conn.createStatement();
ResultSet rs = stat.executeQuery("select * from ABC; select * from DEF;");
while(rs.next()) {
//Iterate through first resultset
}
rs.close();
stat.close();
conn.close();
How can I get the next ResultSet returned by second query?

Use Statement#getMoreResults and Statement#getResultSet methods:
ResultSet rs = stat.executeQuery("select * from ABC; select * from DEF;");
while(rs.next()) {
//Iterate through first resultset
}
rs.close();
if (stat.getMoreResults()) {
rs = stat.getResultSet();
while(rs.next()) {
//Iterate through second resultset
}
}
stat.close();
In order that make this method to work, you should add allowMultiQueries=true property to your connection by appending this property to your connection url:
String url = "jdbc:mysql://yourServer:yourPort/yourDatabase?allowMultiQueries=true";
Note that you can perform multiple queries per Statement using a single Connection object:
Connection con = ...
List<String> sqlStatements = ... //a list with all the SELECT statements you have
for (String query : sqlStatements) {
Statement stmt = con.createStatement();
ResultSet rs = stmt.executeQuery(query);
while (rs.next()) {
//do your logic here...
}
rs.close();
stmt.close();
}
conn.close();

JDBC MySql bind variable syntax error in where clause

I am getting this error:
com.mysql.jdbc.exceptions.jdbc4.MySQLSyntaxErrorException: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near '?' at line 1
public static Person getDetails(int id) {
Connection conn = null;
PreparedStatement stmt = null;
Person newPerson = new Person();
try{
//STEP 2: Register JDBC driver
Class.forName("com.mysql.jdbc.Driver");
//STEP 3: Open a connection
System.out.println("Connecting to database...");
conn = DriverManager.getConnection(DB_URL,USER,PASS);
//STEP 4: Execute a query
System.out.println("Creating statement...");
String sql = "SELECT firstName, lastName, birthday FROM person WHERE id=?";
System.out.println("SQL Statement:\n\t" + stmt);
stmt = conn.prepareStatement(sql);
System.out.println("Prepared Statement before bind variables set:\n\t" + stmt.toString());
//Bind values into the parameters.
System.out.println("ID " + id);
stmt.setInt(1, id); // This would set id
System.out.println("Prepared Statement after bind variables set:\n\t" + stmt.toString());
// Let us select all the records and display them.
ResultSet rs = stmt.executeQuery(sql);
//STEP 5: Extract data from result set
while(rs.next()){
//Retrieve by column name
String firstName = rs.getString("firstName");
String lastName = rs.getString("lastName");
Date birthday = rs.getDate("birthday");
newPerson.setBirthday(birthday);
newPerson.setFirstName(firstName);
newPerson.setLastName(lastName);
newPerson.setId(id);
//Display values
System.out.print("ID: " + id);
System.out.print(", First: " + firstName);
System.out.println(", Last: " + lastName);
System.out.println(", Birthday: " + birthday);
}
//STEP 6: Clean-up environment
rs.close();
stmt.close();
conn.close();
}catch(SQLException se){
//Handle errors for JDBC
se.printStackTrace();
}catch(Exception e){
//Handle errors for Class.forName
e.printStackTrace();
}finally{
//finally block used to close resources
try{
if(stmt!=null)
stmt.close();
}catch(SQLException se2){
}// nothing we can do
try{
if(conn!=null)
conn.close();
}catch(SQLException se){
se.printStackTrace();
}//end finally try
}//end try
System.out.println("Goodbye!");
return newPerson;
}
I have success executing the query without the where clause. I have looked at many examples and nothing I try fixes this.

Don't use executeQuery(String) with prepared statements...
Instead of....
ResultSet rs = stmt.executeQuery(sql);
use...
ResultSet rs = stmt.executeQuery();
Take a look at How to use Prepared Statements for more details

If I understand your question, the problem is you used Statement.executeQuery(String). I'm fairly certain you meant to use PreparedStatement.executeQuery(),
// Let us select all the records and display them.
ResultSet rs = stmt.executeQuery(sql); // <-- adding sql here makes it use the
// Statement version.
You wanted to use
// Let us select all the records and display them.
ResultSet rs = stmt.executeQuery(); // <-- use the version from PreparedStatement

Change
ResultSet rs = stmt.executeQuery(sql);
to
ResultSet rs = stmt.executeQuery();

Cannot process the resultset in jsp

I was trying to call a method in jsp which returns a resultSet. Like,
In JSP:
OracleResultSet rs = null;
rs = getMyValuesHere();
out.println("rs:"+rs);
// rs is not null.Something like oracle.jdbc.driver.OracleResultSetImpl#1f1e1f
How can I retrieve my values here from the resultSet?
because not even entering into this while loop. ,
while(rs.next()) {
}
Method is:
<%!
public OracleResultSet getMyValuesHere()
{
OracleConnection connection = null;
OraclePreparedStatement ptmst = null;
OracleResultSet rs = null;
OracleCallableStatement cstmt = null;
StringBuffer sql = new StringBuffer();
//My query goes here
connection = (OracleConnection) TransactionScope.getConnection();
sql.append("SELECT DISTINCT something.... ");
rs = (OracleResultSet)ptmst.executeQuery();
return rs;
}
%>
I tried printing the data in getMyValuesHere()
rs = (OracleResultSet)ptmst.executeQuery();
while (rs.next())
{
// rs.getString(1)) -- I was able to print this.
}

You didn't specified the Database Driver in your program.. Include the driver in your program and then try it once

Java JDBC First () in ResultSet is not working?

I want to change the position of the cursor to the first row but I don't know why my code is not working.when I add rs2.first():
and also I am getting this error :
This method should only be called on ResultSet objects that are scrollable (type TYPE_SCROLL_INSENSITIVE).
try{
String driver = "org.apache.derby.jdbc.ClientDriver";
Class.forName(driver).newInstance();
String url = "jdbc:derby://localhost:1527/test";
Connection conn = DriverManager.getConnection(url);
String query = "select * from APP.RANKING";
Statement stmt = conn.createStatement();
Statement stmt2 = conn.createStatement();
ResultSet rs = stmt.executeQuery(query);
ResultSet rs2 = stmt2.executeQuery(query);
while (rs.next()){
String BID = rs.getString("BALLOT_ID");
String CN = rs.getString("CANDIDATE_NAME");
String ROID = rs.getString("USER_ID");
Ro1_ID = ROID;
String RA = rs.getString("RANK");
int rowNum = rs.getRow();
int rowNum2;
boolean In_check = false;
while(rs2.next()){
In_ballot.addElement(BID);
}
rs2.First();
In_ballot.addElement(BID);
}
}
catch(Throwable e) {
System.err.println(e.getMessage());
}
this.InB_list.setModel(In_ballot);

By default, calling createStament() in a connection results in every ResultSet having type 'TYPE_FORWARD_ONLY' - This results in the exception you see using first().
Instead, use another versions of createStatement, like this one.
This sample of creating scrollable ResultSets in Derby might help.