Alias
                The alias statement is used for setting an alias according to which a field will be renamed whenever it occurs in the script that follows.
Syntax:
alias fieldname as aliasname {,fieldname as aliasname}
Arguments:
| Argument | Description | 
|---|---|
| 
                                fieldname
                                 | 
                            The name of the field in your source data | 
| aliasname | An alias name you want to use instead | 
Examples and results:
| Example | Result | 
|---|---|
| 
                                 Alias ID_N as NameID;  | 
                            - | 
| 
                                 Alias A as Name, B as Number, C as Date;  | 
                            
                                 The name changes defined through this statement are used on all subsequent SELECT and LOAD statements. A new alias can be defined for a field name by a new alias statement at any subsequent position in the script.  |