DeactivateSomething.cs

using System;
using System.Configuration;
using System.Data.SqlClient;
using System.Threading.Tasks;
using Microsoft.Azure.WebJobs;
using Microsoft.Azure.WebJobs.Host;

namespace MyFunctionApp
{
    public static class DeactivateSomething
    {
        [FunctionName("DeactivateSomething")]
        public static async Task Run([TimerTrigger("0 */5 * * * *")]TimerInfo myTimer, TraceWriter log)
        {
            var str = ConfigurationManager.ConnectionStrings["MyConnectionString"].ConnectionString;
            using (SqlConnection conn = new SqlConnection(str))
            {
                conn.Open();
                var text = "UPDATE [dbo].[SomeTable] SET [IsActive] = 0 WHERE [SomeDate] <= GetDate();";
                using (SqlCommand cmd = new SqlCommand(text, conn))
                {
                    var rows = await cmd.ExecuteNonQueryAsync();
                    Console.WriteLine($"{rows} güncellendi.");
                }
            }
        }
    }
}