autonumber keys

[surajap123]

Hi Experts,

My key fields in the data model is based on string values(instead of number). I want to use autonumber to improve the performance.

Table1, Table2, and Table3 are connected using single key field. So i want to autonumber like below-
autonumber(field1,'key1') as key //to be used in table1
autonumber(field13,'key1') as key //to be used in table2
autonumber(field25,'key1') as key //to be used in table3

Am I correct in doing like above??

I hope the 2nd parameter is not mandatory, unless I use autonumber for any other keys. Am I right??

Please help!