The steps involved in defining, reviewing or changing virtual fields in a file definition are as follows:


1. Select the option to   ___________
 "Define virtual fields  |           |
 in file definition" or  |   FILE    |
 "Review or change       | DEFINITION|
 virtual fields in file  |   MENU    |
 definition" from the    |___________|
 file definition menu.        |    
                              |
                              |
                          ____|______
2. Define, review, change|           |
 or delete virtual       |  VIRTUAL  |
 fields defined in the   |  FIELDS   |
 file using the          |  IN FILE  |
 resulting display.      |___________|
                               |     \
                               |      \___________
                               |                  |
3. Optionally review or   _____|_____        _____|_____   Optionally
 modify the extended     |           |      |           |  review or
 definition for the      |  VIRTUAL  |      |  VIRTUAL  |  modify the
 virtual field by        |   FIELD   |  OR  |   FIELD   |  RPG/400 code
 specifying the type of  | EXTENDED  |      | RPG CODE  |  that is used
 action to derive the    |DEFINITION |      |___________|  to derive
 virtual fields.         |___________|                     virtual field
      __________________/     / \     \_________________
     |                 ______/   \_____                 |
     |                |                |                |
 ____|_____      _____|_____      _____|_____      _____|_____
|          |    |           |    |           |    |           |
|SUBSTRING |    | CONCAT'S  |    |   MATHS   |    |   DATE    |
|          | OR |           | OR |CALCULATION| OR |CONVERSION |
|          |    |           |    |           |    |           |
|__________|    |___________|    |___________|    |___________|
 
4. Derive        Derive virtual   Derive virtual   Derive virtual
virtual field    field by a       field by a       field by a
by substringing  concatenation    mathematical     date conversion
a field/record   of fields        calculation      of a field

 

 



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