Hi,
This can work, but not like you wrote it. You need to use the same separator for the columns.
So if you use ";" between product_code and price_value, you also need to use ";" between price_value and price_access
Also, the "price_access" column consists of a list of Joomla user group ids separated by a comma and with a comma prepended and appended to that list.
So, if you want a price to be restricted to the user groups with the ids 10 and 16, you would have to write the following in that column: ,10,16,
So, in your example, it should be:
product_code;price_value;price_access
00-00-0000;66.150;,16,
...
...
Also, if you want to import several prices, you need to separate them by a "|" in each price column.
For example, if you want to import a product with a price value of 100 for the users of the user group 10 and a price value of 66.15 for the users of the user group 16, you would need something like this:
product_code;price_value;price_access
00-00-0000;100|66.15;,10,|,16,
...
...
I would recommend you use the "export" button of the products listing after selecting a product with several prices. You'll see a concrete example of what you need to do if you look at these columns as the export tool respects the format supported by the import tool.