Power BI

I have two tables in postgres database and I have created a venn diagram based on the tables. I have used DirectQuery type for connection to database from my POWER BI desktop. Now I want my venn diagram to update as soon as data in the database table is added, modified or deleted. How can I achieve so?

I have tried to achieve the same by setting the page refresh to change detection, however in change detection I can only see couple of predefined calculation like COUNT, SUM, COUNT(UNIQUE) etc. So how could I track if data is modified in database.

Please help me finding the solution. Thanks!

Predefined Calculations: