Oracle’s PL/SQL language has several defining characteristics:
It is a highly structured, readable, and accessible language
If you are new to programming, PL/SQL is a great place to start. You will find that it is an easy language to learn and is rich with keywords and structure that clearly express the intent of your code. If you are experienced in other programming languages, you will very easily adapt to the new syntax.
It is a standard and portable language for Oracle development
If you write a PL/SQL procedure or function to execute from within the Oracle database sitting on your laptop, you can move that same procedure to a database on your corporate network and execute it there without any changes (assuming compatibility of Oracle versions, of course!). “Write once, run everywhere” was the mantra of PL/SQL long before Java appeared. For PL/SQL, though, “everywhere” means “everywhere there is an Oracle database.”
It is an embedded language
PL/SQL was not designed to be used as a standalone language, but instead to be invoked from within a host environment. So, for example, you can run PL/SQL programs from within the database (through, say, the SQL*Plus interface).