Question

I am having a small problem while I try to insert some data in my database (MS – SQL).
I am using this code (I just copy-paste all of it, so someone might understand smth that I don’t)

 try 
              {
                  Connection connection = null;
                  Statement Statement = null;
                  ResultSet ResultSet = null;
                  String query = "";

              // jdbc:sqlserver://[serverName[\instanceName][:portNumber]][;property=value[;property=value]]
              String host = "jdbc:sqlserver://server;databaseName=db";
              String username = "user";
              String password = "pass";
              Statement = connection.createStatement();
              DateFormat dateFormat = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
              Calendar cal = Calendar.getInstance();

              DateFormat dateFormat1 = new SimpleDateFormat("dd.MM.yyyy");
              Calendar cal1 = Calendar.getInstance();

              for (int k = 0; k < idArray.length ; k ++ )
              {
                  query = "INSERT INTO Companies (ID,Company,Company2,Company3,Country,ZIP,City,Street," +
                        "Phone,Fax,Email,Internet,CustomerNo,AccountMngr,Icon,AddressSource," +
                        "UserDefined1,UserDefined2,CreatedOn,CreatedBy,ColectedInformation) " +
                        " VALUES ('" + UUID.randomUUID() + "','" + company_nameArray[k] 
                                + "','" + company_name2Array[k] + "','" + company_name3Array[k] + "','DE','"   
                                + zipArray[k] + "','" + cityArray[k] + "','" + streetArray[k] + "','"  
                                + phone_Array[k] + "','" + faxArray[k] + "','" + emailArray[k] + "','"
                                + internetArray[k] + "','" + customer_noArray[k] 
                                + "','d','131','60','Baufinder Import','Import Datum "
                                + dateFormat1.format(cal1.getTime()) + "','" 
                                + dateFormat1.format(cal1.getTime()) + "','d','" 
                                + "cxcxvcx" +  
                                "')";

                  ResultSet = Statement.executeQuery(query);   
              }

              connection.close();
          }
          catch(NullPointerException e)
          {
                System.out.println("NullPointerException");
          }
          catch ( SQLException err ) 
          {
              System.out.println( "SQL Exception:" ) ;

              // Loop through the SQL Exceptions
              while( err != null )
                 {
                  System.out.println( "State  : " + err.getSQLState()  ) ;
                  System.out.println( "Message: " + err.getMessage()   ) ;
                  System.out.println( "Error  : " + err.getErrorCode() ) ;

                  err = err.getNextException() ;
                 }
          }
          catch( Exception e )
          {
              System.out.println( "There is a problem with " + e ) ;
          }

    }

and I am getting this error:

SQL Exception: State : null
Message: There was no result set returned by the statement.
Error : 0

I don’t understand the problem with the result test. I have been using it a lot, since I try to read the data from another database and now I try to insert them to another.
Furthermore, all of these tables do not include null values.

Thank you in advance:)

Answer 1

Use Statement#executeUpdate(String) instead of Statement#execute(query);

for (int k = 0; k < idArray.length ; k ++ )
          {
              query = "INSERT INTO Companies (ID,Company,Company2,Company3,Country,ZIP,City,Street," +
                    "Phone,Fax,Email,Internet,CustomerNo,AccountMngr,Icon,AddressSource," +
                    "UserDefined1,UserDefined2,CreatedOn,CreatedBy,ColectedInformation) " +
                    " VALUES ('" + UUID.randomUUID() + "','" + company_nameArray[k] 
                            + "','" + company_name2Array[k] + "','" + company_name3Array[k] + "','DE','"   
                            + zipArray[k] + "','" + cityArray[k] + "','" + streetArray[k] + "','"  
                            + phone_Array[k] + "','" + faxArray[k] + "','" + emailArray[k] + "','"
                            + internetArray[k] + "','" + customer_noArray[k] 
                            + "','d','131','60','Baufinder Import','Import Datum "
                            + dateFormat1.format(cal1.getTime()) + "','" 
                            + dateFormat1.format(cal1.getTime()) + "','d','" 
                            + "cxcxvcx" +  
                            "')";

              int updatedRowCount = Statement.executeUpdate(query);   
          }

Notes:

1. Please consider using PreparedStatement to prevent possibility of SQL Injection if some data directly input by User.
2. Try to use batch insert if you need to improve performance of inserting.