Database Analyzer Charts allows you to define virtual colums. After defining a virtual column
you can work with it as if it were an original column.
Follow these steps to define a virtual colum:
Procedure
Right-Mouse click on a column name in the column list and choose Add new
Column from the context menu.
A dialog box pops up and allows you to define a Name, an
Acronym and a Script (formula)
for the new column. Note: it is not necessary to use an equal sign (=) to
start the formula. You can specify any formula by making use of existing
columns. As a typing aid just type CTRL + Space and all available column names appear in a list to be picked out.
Click Finish to close the dialog box. The virtual column will be
added to the table.