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Default=NO (unchecked).
Rules
- At least one of Populate real column when writing to table and Derive value when record is read must be selected. Both values may be selected.
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- This option is not supported for the 3.3.9 Mathematical Calculations virtual.
- You can add validation rules to virtual columns but be careful that the virtual column is included on the display so that it can be highlighted when an error occurs. In the case of a date virtual, you would only display the virtual column with the validation rule and not the real column on the screen.
- Virtual column derivation is also performed relative to predetermined joined columns. Refer to Access Route Definitions and 3.5.10 Derivation.