I've tested the price import for Virtuemart, it works ok.
but I am a little bored by the principle of operation of the addition of the price because by default a new price is created but with "All Default Rules applied" on the price.
What I need is to choose is to have the "Tax(s) applied" rule set to "Apply default rules"
And for the "Applicable rule(s)" on the price (second drop-down) need to set it to "No rule"
Same for the customer group, I need only "Available for everything"
Is there a way to do that, wouldn't it be those options in the product_price template field ?
Actually I expected the price update to be done simply by a value update.
For example in the case of a single price I do it like this (as you already know for sure)

UPDATE #__virtuemart_product_prices
LEFT JOIN #__virtuemart_products
ON #__virtuemart_product_prices.virtuemart_product_id =
#__virtuemart_products.virtuemart_product_id
SET product_price = 'THEPRICE'
WHERE #__virtuemart_products.product_sku = 'THEPRODUCTSKU';
So if you have an advice, thanks !
Regards