PL/SQL has moved to position 19 (from 20) for Jan 2019 (from Jan 2018), on the TIOBE index. Not shabby for a database stored procedural language, that is frequently abused and treated as a SQL scripting language - and not as a proper and formal programming language (an Ada language implementation inside the Oracle database). A pet peeve of mine...
As for SQL, it is at position 9, as a new language added to the index.
The definition of how this languages index is calculated, is at https://www.tiobe.com/tiobe-index/programming-languages-definition/.