You have written an insert$\_$contact procedure that accepts a list of values and manages the insertion of data across several tables with a guarantee that it will write all the data and undo any partial data written before an error in both an Oracle and PostgreSQL database. Please explain how these two database management systems accomplish the tasks, why this is important, how it works, and which approach you like the best and why you like it$.$ Your manager believes your observations are critical to the selection of a database for the new application the company will develop.