>>>I have two fields that are DateTime(). What is the best way to index them? I have tried:
>>>

>>>INDEX ON TRANSFORM(Field01) + TRANSFORM(Field02) ASCENDING TAG Temp
>>>

>>>But they don't seem to order correctly. I would also like the index to be as efficient as possible.
>>
>>Jay, I use dtos(datefield), because it puts it in order by year/month/date. The dtoc() gets it into a string but the order may be a little strange because the year is last.
>
>DTOC() is actually dependent on the current SET DATE setting, so it's a very risky choice for indexes. For a date field, as you say, DTOS() is the way to go. For datetime, as others said, TTOC(,1).
>
>Tamar

I see I'm now called "others" :)