It won't update the inventory levels unless you include the inventory column titles.
You do not want the column headings for anything you aren't wanting to change. Otherwise, it may empty those data fields.
So, if you only empty the values, but left the headings in the sheet, then you may have problems.
For example, if you just want to change the prices, this is how it should be formatted in Excel:
If you have variants, then this is how it should be formatted:
I have done this hundreds of time with no problems. If you need help, let me know. More people need to know how to do this.
Sounds like you might know the definitive answer to this. I need to add SKUs/variant SKUs to all the items in a Shopify account. Right now they're all blank. Is this possible via CSV? I've tried, and the preview appears to show the value in the file, but it doesn't actually add it. Thanks in advance.
Yes, that is something that is not well documented. I believe the ONLY mandatory fields, are the handle and the title. Everything else is ignored unless you include it in the CSV file.
And, if you DO include it in the CSV file, it will be the only fields affected upon the import. This is the secret sauce to being able to manage your products like a pro!