How can write a query on system table in kentico 8.1 because currently it is disabled. Now i am trying to wright a query in Customer table.
Modules -> E-commerce - > Customer (System table)
Create a new Page Type and name it how you'd like and make it a "page type is only a container without custom fields". This will allow you to create any queries you want as well as transformations and utilize them in the out of the box web parts.
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