Hi Marcia,

we uses:

(LOOKUP(LookupTable.Description,MyAlias.MyField,LookupTable.MyField)

It is faster, and work also without index.

If index to exist is sure ( 3-5 % faster ):

(LOOKUP(LookupTable.Description,MyAlias.MyField,LookupTable.MyField,myTag)

If LookupTable have < 8 rows no tag index is faster.

Fabio