使用C#执行操作根据特定值从SQL中选择数据。

string query = "SELECT * FROM TableName WHERE ColumnName = @Value";

command.Parameters.AddWithValue("@Value", specificValue);

using System;
using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        string connectionString = "Data Source=ServerName;Initial Catalog=DatabaseName;User ID=UserName;Password=Password";
        
        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();
            
            string query = "SELECT * FROM TableName WHERE ColumnName = @Value";
            
            using (SqlCommand command = new SqlCommand(query, connection))
            {
                command.Parameters.AddWithValue("@Value", specificValue);
                
                using (SqlDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        string data = reader.GetString(0); // 获取第一列的数据
                        Console.WriteLine(data);
                    }
                }
            }
        }
    }
}