Question

我想从数据库表字中获取前10个数据（按频率）并将字传递给字符串数组。表名：字 colums：word，frequency

这是我的代码，但我不知道我应该写什么样的循环if if statement;

 string[] kyt = new string[10];
            SqlCommand com;
            string cmr;
            con3.Open();
            cmr = "SELECT TOP (10) frequency FROM word GROUP BY frequency ORDER BY frequency DESC";
            com = new SqlCommand (cmr, con3);
            SqlDataReader reader = com.ExecuteReader();
            if (reader.Read()) { 



            }

Answer 1

使用

SELECT frequency 
FROM word 
GROUP BY frequency 
ORDER BY count(*) DESC 
limit 10

然后

List<string> frequencies = new List<string>();
while (reader.Read()) { 
    string frequency = reader["frequency"].ToString();
    frequencies.Add(frequency);
}

从数据库中选择前十个数据并写入字符串数组

1 个答案: