OrderClause.cs

namespace SqlKata
{
    public abstract class AbstractOrderBy : AbstractClause
    {

    }
    public class DateOrderBy : OrderBy
    {
        public string Part { get; set; }

        /// <inheritdoc />
        public override AbstractClause Clone()
        {
            return new DateOrderBy
            {
                Engine = Engine,
                Component = Component,
                Column = Column,
                Part= Part,
                Ascending = Ascending
            };
        }
    }
    public class OrderBy : AbstractOrderBy
    {
        public string Column { get; set; }
        public bool Ascending { get; set; } = true;

        /// <inheritdoc />
        public override AbstractClause Clone()
        {
            return new OrderBy
            {
                Engine = Engine,
                Component = Component,
                Column = Column,
                Ascending = Ascending
            };
        }
    }

    public class RawOrderBy : AbstractOrderBy
    {
        public string Expression { get; set; }
        public object[] Bindings { set; get; }

        /// <inheritdoc />
        public override AbstractClause Clone()
        {
            return new RawOrderBy
            {
                Engine = Engine,
                Component = Component,
                Expression = Expression,
                Bindings = Bindings,
            };
        }
    }

    public class OrderByRandom : AbstractOrderBy
    {
        /// <inheritdoc />
        public override AbstractClause Clone()
        {
            return new OrderByRandom
            {
                Engine = Engine,
            };
        }
    }
}