SELECT语句，C#查询

using System;
using System.Data.SqlClient;

class Program
{
    static void Main()
    {
        string connectionString = "Data Source=(local);Initial Catalog=YourDatabase;Integrated Security=True";
        string sqlQuery = "SELECT * FROM YourTable";

        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            connection.Open();

            using (SqlCommand command = new SqlCommand(sqlQuery, connection))
            {
                using (SqlDataReader reader = command.ExecuteReader())
                {
                    while (reader.Read())
                    {
                        // 处理检索到的数据
                        Console.WriteLine(reader["ColumnName"]);
                    }
                }
            }
        }
    }
}