hsqldb - 如何替換我的Highscore（包含前10）表中的值

Question

我有一個包含2列，名稱和分數的表。 我說它有10個有分數的名稱，如果新分數大於或等於表中的最低分數，我想用新名稱和分數替換最低分 的那一行。

我設法得到最高值的結果集，但我沒有得到用我的新名稱和分數（在Java中）取代它。

String newName = "Test"; 
int score = 12345; 
ResultSet result; 
Statement stat = conn.createStatement(); 
result = stat.executeQuery("SELECT * FROM Highscore ORDER BY Score DESC"); 
result.next(); 
if(result.getInt(2) <= score) { 
    // enter code here 
} 

Answer 1

嘗試這樣的事情

  String newName = "Test"; 
      int score = 12345; 
      int newScore = 54321; 
      ResultSet result; 
      Statement stat = conn.createStatement(); 
      result = stat.executeQuery("SELECT * FROM Highscore ORDER BY Score ASC");// use DESC if u want to replace the highest value 
      result.next(); 
      if(result.getInt(2) <= score) 
      { 
       PreparedStatement preparedStatement = conn.prepareStatement("UPDATE Highscore SET Name =? Score = ? WHERE Score = ?"); 
       preparedStatement.setString(1, newName); 
       preparedStatement.setString(2, newScore); 
       preparedStatement.setString(3, result.getInt(2)); 
       int updateCount = preparedStatement.executeUpdate(); 
      } 

Answer 2

You can use following code to update lowest score record : 

String newName = "Test"; 
int score = 12345; 
ResultSet result; 
PreparedStatement ps = conn.prepareStatement("UPDATE Highscore SET NAME = ?, SCORE = ? WHERE SCORE = (SELECT MIN(SCORE) FROM Highscore)"); 
ps.setString(1, newName); 
ps.setInt(2, score); 
int updatedCount = ps.executeUpdate(); 
if(updatedCount>0) 
System.out.println("Record Successfully updated");