Retrieve varchar column from Oracle query in a resulset

Question

Hi, I'am a begginer in JSP Technologies.
I've do a small jsp that opens a db connection to an oracle, execute a query a show results.
When the columns of the query are int I've no problem, the jsp show the columns of the resulset, but when the columns selected are varchars the jsp doesn't show anything....
Can anyone help me?
Example:
Table: CUSTOMERS
Col1 : ID_COSTUMER int
Col2: CUSTOMER_NAME varchar
<%
Connection canal = null;
ResultSet tabla = null;
Statement instruccion=null;
try { Class.forName("oracle.jdbc.driver.OracleDriver");
canal=DriverManager.getConnection("jdbc:oracle:thin:@XXXXXXXXXXXXXXXXXXXp");
instruccion = canal.createStatement(ResultSet.TYPE_SCROLL_SENSITIVE, ResultSet.CONCUR_UPDATABLE);
} catch(java.lang.ClassNotFoundException e){};
String Query = "SELECT ID_CUSTOMER FROM CUSTOMERS";
try { tabla = instruccion.executeQuery(Query);
out.println("<TABLE Border=10 CellPadding=5><TR>");
out.println("<TD>CUSTOMER</TD></TR>");
while(tabla.next()) {
out.println("<TR>");
out.println("<TD>"+tabla.getString(1)+"</TD>");
out.println("</TR>"); };
out.println("</TABLE></CENTER></DIV></HTML>");
tabla.close(); instruccion.close(); canal.close();}
catch(SQLException e) {};
%>Results:
CUSTOMER
1
2
3
4
Doing the change in query:
SELECT CUSTOMER_NAME FROM CUSTOMERS
I have not results....
Thank you.

Answer 1

sorry, I misplaced an ending code bracket on last one
I'm not really familiar with doing this inside a jsp.. but there are a few things that you should try to make sure that it isn't a database problem before assuming it is a problem on your jsp.... It is possible you have already tried the following but just to make sure.
When you do the second query does the first two out.printlns that are before the while still output? If not then your query is incorrect.
Second I would try
String Query = "SELECT ID_CUSTOMER,CUSTOMER_NAME FROM CUSTOMERS";
try { tabla = instruccion.executeQuery(Query);
out.println("<TABLE Border=10 CellPadding=5><TR>");
out.println("<TD>CUSTOMER_ID</TD><TD>CUSTOMER_NAME</TD></TR>");
while(tabla.next()) {
out.println("<TR>");
out.println("<TD>"+tabla.getString(1)+"</TD>");
out.println("<TD>"+tabla.getString(2)+"</TD>");
out.println("</TR>"); };
out.println("</TABLE></CENTER></DIV></HTML>");I suspect this will also return nothing.. if that is the case then you need to check your database. If it does infact return values for the ID and nothing for the NAME then I'm not sure at this point what the problem is.