How to choose the item value list based on another value of list item

Hello friends,
I have two list items named xxx and yyy... OK, my problem is I want to choose a value of yyy list item based on the value of article xxx...

Example: I select 'Computer' in xxx... Based on this I want to choose the item values in yyy as a monitor, keyboard, mouse, etc... This must be done at run time. How can I do this... Give me a few examples of code [pls tell me trigger appropriate to place this encodings]
Thanks in advance,
Battistelli

Very simple to use the LOV and query of the lov which is attached to the YYY field, use the query as below...

SELECT columns
FROM table
WHERE column_name = :XXX_FIELD

Use the ENTER OF LIST Yes property for the YYY field.

-Clément

Tags: Oracle Development

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