NSELECT may be used only when another select-list is currently active. Therefore, NSELECT must be used immediately after a select-list has been created with one of the list-creating commands or reactivated with GET-LIST. NSELECT creates a second select-list of only those items in the active select-list that are not in the file specified by the NSELECT statement.
Format
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NSELECT filename |
Examples
The next example creates a select-list of all of the items in the ORDERS file, then creates a second select-list from the items on this list that are not in the ORDERS.PAID file. The result is a list of those items in the ORDERS file that are currently unpaid:
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>SELECT ORDERS 347 ITEMS SELECTED. >NSELECT ORDERS.PAID 256 ITEMS SELECTED. > |
The unpaid order items may then be listed with this query:
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>LIST ORDERS |
At this point, the REFORMAT command (described in the previous section titled Using INFO/ACCESS Commands for Special Processing) might be used to write these selected items to a file called OVERDUE.ORDERS.
See Also
Creating a Select-list (SELECT)
Selecting Items that Contain a String (FIND)