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MySQL - Query to edit field based on table join?

Posted on 2013-12-18
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Last Modified: 2013-12-18
Hey,

I have a table of products, each with a "product_id" and a field called "weight".

There is a second table with "product_id" and "category_id".

I need to change the field "weight" to equal "2" for every product that has a  "category_id" of 5, 12, 15, 17 or 18.

Can any one help me build this example please?

Thank you
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Question by:mhdi
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acbxyz earned 500 total points
ID: 39728172
This should do it:
update product_table set weight=2
where product_id in (
    select product_id
    from product_category_table
    where category_id in (5, 12, 15, 17, 18)
)

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