private static void CleanAbc()
    {
                using (var sql = Program.Connection())
                {
                    sql.Execute(@"
    declare @expiration datetime = DATEADD(DAY, -21, cast(GETDATE() AS DATE));

    with topfew as (select top 100000 * from abc with(paglock)
        WHERE [time] < @expiration)
    delete topfew;

    set @expiration = DATEADD(MONTH, -6, cast(GETDATE() AS DATE));

    with topfew as (select top 100000 * from abc with(paglock)
        WHERE [time] < @expiration)
    delete topfew;
    ", commandTimeout: 60 * 60 * 12);
                }
    }