Hi

How can I index\retrieve the lines with empty dates.

For example:
User need to confirm each line and the confim date must to be documented.
I can put two columns, one for confirm (logical type or charcter (1)) and one for confirmdate, but I can put only confirmdate and if the date empty its means hat line not confirmed.
Now I want to get all the lines that not conirmed by index.

Help please

Thanks