我已将一些数据插入到数据库中,它包含几个分数。
我需要:
将分数排序并提取前10个结果,包括姓名,ID和用户名
我的插入声明:
// Insert example
String sql = "insert into ratings (id, username, score, name) values (?, ?, ?, ?)";
PreparedStatement preparedStatement = connect.prepareStatement(sql);
preparedStatement.setLong(1, userID);
preparedStatement.setString(2, username);
preparedStatement.setString(3, score);
preparedStatement.setString(4, name);
preparedStatement.execute();
答案 0 :(得分:1)
使用它:
select id, username, score, name from ratings order by score desc limit 10
答案 1 :(得分:0)
您是否尝试过以下操作:
SELECT Id, Username, Score, Name FROM RATINGS ORDER BY SCORE DESC LIMIT 10.
有关详细信息,请参阅MySQL Documentation for Select Clause。
答案 2 :(得分:0)
尝试这种方式:
String sql = "insert into ratings (id, username, score, name) values (?, ?, ?, ?) order by score desc limit 10";
PreparedStatement preparedStatement = connect.prepareStatement(sql);
preparedStatement.setLong(1, userID);
preparedStatement.setString(2, username);
preparedStatement.setString(3, score);
preparedStatement.setString(4, name);
preparedStatement.execute();
答案 3 :(得分:0)
下一个怎么样?:
SELECT id, username, score, name
FROM ratings
ORDER BY SCORE DESC
LIMIT 10
答案 4 :(得分:0)
SELECT * FROM RATINGS ORDER BY SCORE DESC LIMIT 10
您需要ORDER BY
进行排序,然后才需要
DESC
按降序排序,最后排序
LIMIT 10
只有10个结果。