Is there any way to run a update with Case?

Hello Guys,

I have an update script:

update product set price_sell = 123.45 where code=45

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the problem is that I need to create a script with price_sell diferent when I am in a determined table, for example:

update product set price_sell = case database='viadiesel' then 123.45 else 187.74 end if where code=45

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how can I do that? Is it possible?

thanks
Alexandre