Thanks a lot Sergey i will use this:
Message ID:
1053916 INDEX ON field1 + CHRTRAN(field2, ;
"0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\]^_`abcdefghijklmnopqrstuvwxyz", ;
"zyxwvutsrqponmlkjihgfedcba`_^]\[ZYXWVUTSRQPONMLKJIHGFEDCBA@?>=<;:9876543210") TAG t1
I already use it and let me tell you, this is awesome solution, how did you find it? or is it professional secret :)