How can I enter a variable on a ResultSet Execute Query Where clause?

Posted on 2008-10-20
Last Modified: 2012-05-05
This is the Query I need to put a variable on the Where clause. Variable is itemnamestr that will be entered by the user.
rs = stmt.executeQuery("SELECT itemid, itemname FROM inventorytable WHERE itemname = itemnamestr ");
I got this error when putting itemnamestr as variable on SQL Where clause

Got an exception!
Unknown column 'itemnamestr' in 'where clause'

How can I correctly do it?
import java.sql.*; 

import javax.swing.*;

public class NewClass {



    public static void main (String[] args) { 

        String itemnamestr;


        itemnamestr = JOptionPane.showInputDialog(null, "Enter item name.");

        try { 

            String url = "jdbc:mysql://localhost:3306/test1"; 

            Connection conn = DriverManager.getConnection(url,"root","mypassword"); 

            Statement stmt = conn.createStatement(); 

            ResultSet rs; 


            rs = stmt.executeQuery("SELECT itemid, itemname FROM inventorytable WHERE itemname = itemnamestr "); 

            while ( ) { 

                String itemidvar = rs.getString("itemid"); 


                String itemnamevar = rs.getString("itemname"); 




        } catch (Exception e) { 

            System.err.println("Got an exception! "); 





Open in new window

Question by:glynco
  • 3
LVL 20

Expert Comment

by:chaitu chaitu
ID: 22764067
you have to pass variable like this.the string to be in single quote.

   rs = stmt.executeQuery("SELECT itemid, itemname FROM inventorytable WHERE itemname = ' "+itemnamestr +" ' " );
LVL 20

Expert Comment

by:chaitu chaitu
ID: 22764085
instead of statement use PreparedStatement;

 PreparedStatement stmt = conn.prepareStatement(("SELECT itemid, itemname FROM inventorytable WHERE itemname = ?");

Author Comment

ID: 22764104
rs = stmt.executeQuery("SELECT itemid, itemname FROM inventorytable WHERE itemname = ' "+itemnamestr +" ' " );

The records do not show-up.
LVL 20

Accepted Solution

chaitu chaitu earned 500 total points
ID: 22764115
may be space was there within the single quote in the string

the string should be 'itemvarable';

 itemname = '"+itemnamestr +"'" ;

Featured Post

Is Your Active Directory as Secure as You Think?

More than 75% of all records are compromised because of the loss or theft of a privileged credential. Experts have been exploring Active Directory infrastructure to identify key threats and establish best practices for keeping data safe. Attend this month’s webinar to learn more.

Question has a verified solution.

If you are experiencing a similar issue, please ask a related question

Suggested Solutions

Title # Comments Views Activity
Unable to open debugger port in Intellij idea 6 143
groupSumClump challenge 9 100
backtracking recursion  code 19 53
how do i compare an object based on two fields 6 49
Go is an acronym of golang, is a programming language developed Google in 2007. Go is a new language that is mostly in the C family, with significant input from Pascal/Modula/Oberon family. Hence Go arisen as low-level language with fast compilation…
Introduction This article is the first of three articles that explain why and how the Experts Exchange QA Team does test automation for our web site. This article explains our test automation goals. Then rationale is given for the tools we use to a…
This tutorial covers a practical example of lazy loading technique and early loading technique in a Singleton Design Pattern.
This tutorial explains how to use the VisualVM tool for the Java platform application. This video goes into detail on the Threads, Sampler, and Profiler tabs.

910 members asked questions and received personalized solutions in the past 7 days.

Join the community of 500,000 technology professionals and ask your questions.

Join & Ask a Question

Need Help in Real-Time?

Connect with top rated Experts

23 Experts available now in Live!

Get 1:1 Help Now