It can be done, but what do you need this index for? If you use indices are to ensure uniqueness of data, for referential integrity, or to search, it doesn't matter whether the index is ascending or descending (therefore, use an ascending index).

If it is for a report, just use SELECT - SQL, with the ORDER BY clause. Here, you can explicitly use ASCENDING and DESCENDING for individual fields, and you don't need to concatenate everything into a single expression.

>Hi Everyone,
>
>I want to index my table on two columns (item_code + item_date). I want to index in such way that,
>
>Item_date is sorted in descending order and item code is sorted on ascending order.
>
>E.g.
>Item_code Item_date
>========= =========
>Item1 01/01/2003
>Item2 01/01/2003
>Item3 01/01/2003
>Item1 01/04/2003
>item2 01/04/2003
>item3 01/04/2003
>
>The above should be displayed as;
>Item_code Item_date
>========= =========
>Item1 01/04/2003
>Item2 01/04/2003
>Item3 01/04/2003
>Item1 01/01/2003
>item2 01/01/2003
>item3 01/01/2003
>
>Any suggestions???
>
>Cheers
>Shaishav