java.sql.SQLException：找不到 - JDBC

Question

運行我的代碼時，我不斷收到以下錯誤：java.sql.SQLException：Column'Hours Worked'not found。

任何有關我要出錯的想法，我很抱歉，如果它很明顯，我仍然試圖學習如何正確使用JDBC。

這裏就是我認爲錯誤是在我的代碼：

String sql = "SELECT jobID, 'Hours'+'/'+'Worked', Description, Address, 'Materials'+'/'+'Used', Seen FROM main"; 
      ResultSet rs = stmt.executeQuery(sql); 
      //Extract data from result set 
      while(rs.next()){ 
      //Retrieve by column name 
      int id = rs.getInt("JobID"); 
      int Hrs = rs.getInt("Hours Worked"); 
      String description = rs.getString("Description"); 
      String Address = rs.getString("Address"); 
      String Materials = rs.getString("Materials Used"); 
      String Seen = rs.getString("Seen"); 

      //Display values 
      System.out.print("JobID: " + id); 
      System.out.print(", Hours Worked: " + Hrs); 
      System.out.print(", Description: " + description); 
      System.out.println(", Address: " + Address); 
      System.out.println(", Materials Used: " + Materials); 
      System.out.println(", Seen: " + Seen); 
      } 

Answer 1

必須包裹在方括號空格的列名在SQL Server查詢是這樣的：

String sql = "SELECT jobID, [Hours Worked], Description, Address, [Materials Used], Seen FROM main";