Which trigger should be used?

Hi exports,
I have a multi records tublar data block. there is a colum called expiry_date. The logic is:
1 In sert mode, this colum is protected and null values will be saved into the database.
2. In update mode, when user click "Expiry_date" colum, this colum is automatically populated with system date
Could you advise what's the best way to code this logic?
Thanks in advance for the help!
Michael

Hi,
>
I have a multi records tublar data block. there is a colum called expiry_date. The logic is:
1 In sert mode, this colum is protected and null values will be saved into the database.
2. In update mode, when user click "Expiry_date" colum, this colum is automatically populated with system date
Could you advise what's the best way to code this logic?
>
If Expiry_date is anyway not to be entered by a user then why do you need it on the Form as displayed/enterable item? It should be hidden. And you should write a Before Update For Each Row trigger on the table to set :NEW.EXPIRY_DATE := SYSDATE.
Regards,

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