Look, i test the two way:
1. I create two tag
a. index on codigo for !delete() tag i001
b. index on codigo tag i002
2. Close Visual foxpro
3. Load Visual Foxpro , and i used de "DBFFile" with SET ORDER TO I001,
Execute the Select Sentence, and it was faster
4. Close Visual foxpro
5. Load Visual Foxpro , and i use de "DBFFile" with SET ORDER TO I002,
Execute the Select Sentence, and it was faster

But, say you, that we can make , for change it. or Say me the number records of the table, and i will create it