Adding all tracks, I guess

plsql/hello-world/README.md

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+# Hello World
+
+The classical introductory exercise. Just say "Hello, World!".
+
+["Hello, World!"](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program) is
+the traditional first program for beginning programming in a new language
+or environment.
+
+The objectives are simple:
+
+- Write a function that returns the string "Hello, World!".
+- Run the test suite and make sure that it succeeds.
+- Submit your solution and check it at the website.
+
+If everything goes well, you will be ready to fetch your first real exercise.
+
+## Setup
+
+Go through the setup instructions for PL/SQL to get ready to code:
+
+http://exercism.io/languages/plsql
+
+## Running the Tests
+
+Execute the tests by calling the `run` method in the respective `ut_<exercise>#` package.
+The necessary code should be contained at the end of the test package.
+As an example, the test for the _hamming_ exercise would be run using
+
+```
+begin
+  ut_hamming#.run;
+end;
+/
+```
+
+## Source
+
+This is an exercise to introduce users to using Exercism [http://en.wikipedia.org/wiki/%22Hello,_world!%22_program](http://en.wikipedia.org/wiki/%22Hello,_world!%22_program)
+
+## Submitting Incomplete Solutions
+It's possible to submit an incomplete solution so you can see how others have completed the exercise.

plsql/hello-world/hello_world#.plsql

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+CREATE OR REPLACE PACKAGE hello_world# IS
+   FUNCTION hello(
+      i_name                                        varchar2 := ''
+   ) 
+      RETURN varchar2;
+
+END hello_world#;
+/
+
+CREATE OR REPLACE PACKAGE BODY hello_world# IS
+   FUNCTION hello(
+      i_name                                        varchar2 := ''
+   ) 
+      RETURN varchar2
+   AS
+   BEGIN
+      RETURN NULL;
+   END hello;
+END hello_world#;
+/

plsql/hello-world/ut_hello_world#.plsql

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+CREATE OR REPLACE PACKAGE ut_hello_world#
+IS
+   PROCEDURE run;
+END ut_hello_world#;
+/
+
+CREATE OR REPLACE PACKAGE BODY ut_hello_world#
+IS
+
+   PROCEDURE TEST (
+      i_descn     varchar2,
+      i_exp       varchar2,
+      i_act       varchar2
+   )
+   IS
+   BEGIN
+      IF i_exp = i_act THEN
+         dbms_output.put_line('SUCCESS: ' || i_descn);
+      ELSE
+         dbms_output.put_line(
+            'FAILURE: '   || i_descn || 
+            ': expected ''' || NVL('' || i_exp, 'NULL') || 
+            ''', but got '''  || NVL('' || i_act, 'null') || '''!'
+         );
+      END IF;
+   END TEST;
+
+   PROCEDURE run
+   IS
+   BEGIN
+      TEST(
+         i_descn  => 'no name',
+         i_exp    => 'Hello, World!',
+         i_act    => hello_world#.hello()
+      );
+      
+      TEST(
+         i_descn  => 'sample name',
+         i_exp    => 'Hello, Alice!',
+         i_act    => hello_world#.hello('Alice')
+      );
+      
+      TEST(
+         i_descn  => 'other sample name',
+         i_exp    => 'Hello, Bob!',
+         i_act    => hello_world#.hello('Bob')
+      );
+   EXCEPTION
+      WHEN others THEN
+         dbms_output.put_line('Test execution failed.');
+         dbms_output.put_line(sqlerrm);
+   END run;
+
+END ut_hello_world#;
+/
+
+BEGIN
+   ut_hello_world#.run;
+END;
+/