We can find the Nth highest value in screen flow using Get Records with a bit of logic. For example, we want to find the Nth highest NumberOfEmployees value across all the accounts. The idea is to fetch the records and then run a check to iterate over the records as long as the temp variable value is less than N value. The temp variable is initialized to 1. In the assignment we would keep on removing the first record. At the end, we will pick the first record from the collection. Attached are the screenshots. Note: this is just a POC flow and the error handlings, best practices are not covered.
We can also pass custom apex-defined variable from flow to LWC. In this case, we have to define the property type as apex://namespace.Classname and expose the same variable as @api. Attached are the screenshots.
Whenever we are setting any picklist field value to blank, it will get stored in database as NULL. So we need to be careful while processing this data after fetching from database. In this example, we are creating an account in a test method with type as blank, and populating blank using single quotes instead of NULL. Now after we fetch the data from the database it is NULL, not blank. Attached are the screenshots.
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