Index and match

Dear community members,

I am very new to power query and just made my first steps. Until now I've just created connections, filtered and sorted the data queries.

My question:

I have 3 tables and would like to add 5 columns to one of the tables called "order information".

Basically the columns I would like to add are information in a column in another table (activities: eg. 10 and 30 and record date). Also I would like to add the "category decription" in a column according to the category number. Table 2 (order information) has unique "order numbers".

If I would work on this tasks in excel, I would probably use index and match. But I would like to solve it in a more efficient way in power query. Any ideas and recommendations?

Thanks in advance!

Jan

clarification