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Current Range Table Definition area
Use this area to view, edit, or delete rows in the range table.
Current Range Table Definition list
View all rows in the current range table.
To edit or delete a row, select the row and click Edit or Delete.
Edit
Copy the selected row to the Condition section of the dialog box, where
you can modify it.
When you finish modifying the condition, click Add To List to update the
row in the Current Range Table Definition list.
Delete
Delete the selected row.
Clear List
Delete all rows from the current range table.
Expressions in the Current Range Table Definition list are evaluated from
top to bottom, that is, in the order you enter them. As soon as one condition
is evaluated as TRUE, AutoCAD Map 3D stops evaluating, ignores the
remaining expressions, and returns the value associated with the TRUE
condition in the range table.
For example, assume you enter the following expressions:
If < 0 Return: Low
If < 15 Return: Medium
If < 30 Return: High
If < 45 Return: Very High
With a value of 20, the first condition evaluates to FALSE because 20 is not
less than 0. The second condition also evaluates to FALSE since 20 is not
less than 15. However, the third condition evaluates to TRUE since 20 is
less than 30, and the value returned by the range table is High. The last
condition, although TRUE, is ignored.
Condition area
Edit an existing row, or create a new one.
■ To edit an existing row, select the row in the Current Range Table
Definition list and click Edit. When you finish, click Update.
■ To create a new condition, select an operator, specify an expression and
a return value, and click Add.
1844 | Chapter 33 Query Dialog Boxes