How to use multiple tables in developing one Graph in Endeca Integrator

We have the requirement where we want to show the matrix for a particular entity which is coming from two separate table, there is a join which is possible on both the tables to get the correct data. But we are not able to find how to use data from two tables. We can create the SQL query with all the joining conditions but there are many tables which are involved so performance of query will be a problem. Is there any way in Endeca where I can create two data sources using two separate queries and while showing the matrix , I can join both the tables to get the matrix .

You have not mentioned the version of Endeca that is used for your application. Joins are recently introduced in version 2.3 and could be used for avoiding complex DEFINE analytical statements. For this to work, the data should be present in the same dgraph and a single data source in Studio should point to data from both sources.
These may not yet be the type of SQL joins that you may expect them to be as performing complex joins is also costly in Endeca. Hope you are not expecting to join huge data sets.
The best possible solution I could think for addressing this problem is to load denormalized data (at least for now) into Endeca and do aggregations in queries. We can denormalize data in multiple ways even using ETL tools not just SQL queries as the above comment states.

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