Here is the abstract of a talk that I've so far given at more than a dozen Oracle User Group conferences, starting in Israel in Jun 2015:
“Large software systems must be built from modules. A module hides its implementation behind an interface that exposes its functionality. This is computer science’s most famous principle. For applications that use an Oracle Database, the database is, of course, one of the modules. The implementation details are the tables and the SQL statements that manipulate them. These are hidden behind a PL/SQL interface. This is the Thick Database paradigm: select, insert, update, delete, merge, commit, and rollback are issued only from database PL/SQL. Developers and end-users of applications built this way are happy with their correctness, maintainability, security, and performance. But when developers follow the NoPlsql paradigm, their applications have problems in each of these areas and end-users suffer. This session provides PL/SQL devotees with unassailable arguments to defend their beliefs against attacks from skeptics; skeptics who attend will see the light.”
My presentation slides are no use without me presenting them. I have therefore written a whitepaper that gives a careful and detailed account of what my presentation addresses. HERE it is.
Note added May-2016
I gave this talk at the DOAG conference, in November 2015. (DOAG is the German Oracle User Group.) I summarized what I said in an interview. The six-minute video is published HERE.
Note added November-2016
I just published the post "Oren Nakdimon on #ThickDB". Do please read it and then download and watch Oren's talk. It substantiates, with real-world experience, everything I say in my "Why Use PL/SQL?" whitepaper.