What is the difference between Product ID and SKU?

[jens_sch]

What is the difference between Product ID and SKU?

[heaven7 · Accepted solution]

Hi,

Product ID is increment id to store in MySQL database. This could be only number and unique value.

SKU is unique identifier for one product. This could be any character.

Best Regars, 

[kgerasimov]

In a nutshell: you cannot change product ID but you can change product SKU using only magento backend interface.