Will use fake data as you know... sensitive stuff. It's reading from a XLS with 2 tables but you could use other arrays like JSON.
I started with a file with 2 tables (one per sheet) with the info I need, the result will be a table for each customer in the second table. (4 Tables in total in this example).
I developed this because I needed only some columns and not all from a larger data set (and not include the columns added by powerapps)
XLS Samples
In this case, a manually triggered flow that Get Rows from each table.
Import the 2 tables
Then starts the tricky part. Create a FILTER operation (do not add the apply to each, will be done automatically). in From you select the COLUMN (Customer in this case) from Data table to be equal to COLUMN (Customer also) in Customer_list table), in advanced mode looks like this: (Flow will add the apply to each automatically since is an array of elements)
@equals(item()?['Customer'], items('Apply_to_each')?['Customer'])
Then you add a SELECT step where you will need to use from the Body of Filter Array Output, in Map suggest to add the column names that will be displayed in your CSV or HTML table and then click the advanced mode (highlight in yellow).
Add filter to tables
Very important, you will have a JSON structure that you need to complete, for sake of the example (and being organized) the Property label (let's call them Columns) is the same as the want to fetch from the filtered data. This is not mandatory, you can put the label or Display name differently but the info to fetch needs to be the same as from the output of Filter (careful with spaces and special characters, makes it more tedious). So, for SKU label I want to fetch the data that was on the SKU column in my excel, (all of them, one by one) to be more clear with this example will be: "SKU":@item()?['SKU'], you continue until you are done with all, if you break the JSON structure it won't let you continue. I always do it in text/advanced mode.
Select to Output - JSon Structure
Almost done, the output of SELECT needs to be added to step Create CSV table or HTML, as you wish to then easily incorporate to an email or whatever.
Create CSV
If we examinate the output of the Flow you will see with more details how the XLS table input is managed in Flow as JSON object and then manipulated.
Output
This a simple example, I have managed (after trying and trying over weeks) using this approach with more complex info (like JSON arrays and outputs from Web APIs) but it is very similar.
Let me know how it works, if you have trouble post your screenshoots to guide you directly.
Cheers!
Fernando M
