Question

dbStatement = con.createStatement();
dbResult = dbStatement.executeQuery("SELECT Vendor_Code FROM temp ORDER BY status ASC ");

while (dbResult.next())
{
    VendorCode=dbResult.getString("Vendor_Code");
    System.out.println(VendorCode);

    dbStatement.executeUpdate("INSERT INTO temp1 VALUES ('"+VendorCode+"')");
}

In the above code I am selecting a list of vendor code in the ascending order of their status,it works properly if I don’t add:

dbStatement.executeUpdate("INSERT INTO temp1 VALUES ('"+VendorCode+"')");  

into the while loop. If I add this I’m getting result as only the first value which is in the sorted list and also it’s getting inserted into the temp1 table…

I am using Java swing and MySQL in NetBeans. Any idea please why this is happening?

If I do the above code in other way as,

    dbStatement = con.createStatement();
    dbInsert = con.createStatement();
    dbResult = dbStatement.executeQuery("SELECT Vendor_Code FROM temp ORDER BY               status ASC ");

     while (dbResult.next())
             {
                 VendorCode=dbResult.getString("Vendor_Code");


                dbResult = dbInsert.executeQuery("SELECT Bid_No,Vendor_Name,Vendor_Address,Amount,Tax_Percentage,Amount_Aftertax,Expected_Deliverydate,Vendor_Code FROM purchase_bid    where   PE_Number='"+penumber+"' AND Vendor_Code='"+VendorCode+"'  ");


                 while(dbResult.next())

                    {


                      Bid_Number=dbResult.getString("Bid_No");
                      vendor_name=dbResult.getString("Vendor_Name");
                      vendor_address=dbResult.getString("Vendor_Address");
                      Amount=dbResult.getString("Amount");
                      tax=dbResult.getString("Tax_Percentage");
                      date2=dbResult.getString("Expected_Deliverydate");
                      Amount_Aftertax=dbResult.getString("Amount_Aftertax");
                      venCode=dbResult.getString("Vendor_Code");
                      date3=date2.split("-");
                        String day="";
                        String month="";
                        String year="";
                        day=date3[2];
                        month=date3[1];
                        year=date3[0];

                     date=day+"-"+month+"-"+year;
                      addtoCart();//for displaying it in jTable


                   }


              }

It does not take VendorCode in ascending order for retrieving values from purchase_bid table..Then it again takes first sorted value and nothing is displayed in jTable.

Answer 1

You should only use the statement instance for one operation. So calling the executeUpdate-method erases the ResultSet obtained by the executeQuery-method.

Create a second statement, so that:

dbStatement = con.createStatement();
dbInsert = con.createStatement();
dbResult = dbStatement.executeQuery("SELECT Vendor_Code FROM temp ORDER BY status ASC ");

while (dbResult.next())
{
    VendorCode=dbResult.getString("Vendor_Code");
    System.out.println(VendorCode);

    dbInsert.executeUpdate("INSERT INTO temp1 VALUES ('"+VendorCode+"')");
}

If you’re not just testing and you actually want to bulk insert the Vendor_Code from temp to temp1, try using INSERT … SELECT

dbInsert = con.createStatement();
dbInsert.executeUpdate("INSERT INTO temp1 SELECT Vendor_Code FROM temp");

See the official MySQL documentation for further details on this type of INSERT:
http://dev.mysql.com/doc/refman/5.1/en/insert-select.html