Question : no value and value

insert into product.inwarehouse value '2'  where product.internsku = 'hello'


i want this command to work when product.inwarehouse has no value and when product.inwarehouse has a value

Answer : no value and value

can u please clarrify

insert into product (inwarehouse)
SELECT  '2'  
FROM product
where internsku = 'hello'
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