Question

我需要从复制的数据库中打印四列，并且我只需要使用JDBC。打印所有格式整齐的列的工作是我认为我可以处理的。它创建表的副本，然后插入给我带来困难的所需行。是否可以编写executeQuery（）字符串来实现这一目标？我知道要插入我需要使用executeUpdate（）的行。我将不胜感激任何帮助或指导。感谢。

    public static void main(String args[]) throws SQLException {
    // define common JDBC objects
  Connection connection = null;
  Statement create = null;
  Statement insert = null;
  ResultSet rs = null;

      // Connect to the database
      String dbUrl = 
          "jdbc:oracle:xxxxxxxxxxxxxxxxxxxxxxxxxx";
      String username = args[0];
      String password = args[1];
      Collection<String> result = new ArrayList<String>();
      connection = DriverManager.getConnection(
          dbUrl, username, password);
      create = connection.createStatement();
      String query =
              "CREATE TABLE newTable AS " 
            + "SELECT * " 
            + "FROM oldTable; ";          
      rs = create.executeQuery(query);

      insert = connection.createStatement();          
      int rows = insert.executeUpdate("INSERT INTO newTable SELECT * FROM oldTable ");
      if (rows == 0) {
        System.out.println("No rows");
      } else {
        System.out.println(rows + " row(s)affected.");
        connection.close();
      }
    }
  }

 //and here is the combined sql statement with CREATE and INSERT:
statement = connection.createStatement();
sql = 
"CREATE TABLE newTable AS SELECT * FROM oldTable "
+ "INSERT INTO newTable "
+ "(" + " col01,col02,col03,col04, "
+ "col05,col06,col07,col08,col09, "
+ "col10,col11,col12 " + ") "
+ "VALUES " + "(" + "'data01','data02','data03','data04', "
+ "data05,data06,data07,'data08',data09,data10,data11,data12 " +")" ;
   statement.executeUpdate(sql);

JDBC仅使用Java

0 个答案: