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Re: declare column update expression

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Hello,

2008/9/11 Chris Velevitch <chris.velevitch@xxxxxxxxx>:
> In 7.4, how do I declare that a column in a table is to be
> automatically set to the value of some fixed expression whenever a row
> is updated?
>
> Eg column last_modified is always set to current_timestamp
>

you should to use trigger

regards
Pavel Stehule

>
>
> Chris
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