C# sql更新查询

UPDATE table_name
SET column1 = value1, column2 = value2, ...
WHERE condition;

using System;
using System.Data.SqlClient;

public class UpdateExample
{
    public static void Main()
    {
        string connectionString = "your_connection_string_here";
        string sql = "UPDATE Employees SET Salary = @Salary WHERE EmployeeID = @EmployeeID";

        using (SqlConnection connection = new SqlConnection(connectionString))
        {
            SqlCommand command = new SqlCommand(sql, connection);
            command.Parameters.AddWithValue("@Salary", 50000);
            command.Parameters.AddWithValue("@EmployeeID", 1);

            try
            {
                connection.Open();
                int rowsAffected = command.ExecuteNonQuery();
                Console.WriteLine($"{rowsAffected} row(s) updated.");
            }
            catch (Exception ex)
            {
                Console.WriteLine("Error: " + ex.Message);
            }
        }
    }
}