Currently to create mock data you can use either the mock data sets or create a preparation query (per unit test) in order to create some mock data this way.
Especially with larger mock datasets it can be tedious to enter all the mock data manually.
I’d like to be able to use the power of SQL to create mock data sets. Instead of creating a preparation query per unit test to create some mock data I’d like to be able to write a query that will create me some mock data. This query should be run before the current preparation query of the associated unit test.
This way you will be able to re-use your mock data preparation query instead of writing them per unit test and have a more powerful option to create some mock data.