Help explaining Code

Question

INSERT INTO TABLE (SELECT c.consists_of
FROM programme_tab c WHERE programme# = 'P111')
(SELECT REF(m) FROM module_tab m WHERE module# = 'a111' OR module# = 'a112');
Can someone help me explain this code in plain English , it is for revision reasons

Answer 1

Thanks for the help guys
a bit more code
create TYPE module_m;/
CREATE TYPE programme_p;/
CREATE OR REPLACE TYPE "ADDRESS2_T" as object(
street varchar2(200),
town varchar2(200),
county char(20),
postcode varchar2(20)
CREATE OR REPLACE TYPE MODULE_LIST_T AS TABLE OF REF module_t;
CREATE OR REPLACE TYPE MODULE_T as object (
module_id char(4),
module_title varchar2(20),
no_credits number(2),
is_part_of REF programme_p
CREATE OR REPLACE TYPE "PERSON2_T" as object(
person_id char(4),
pname varchar2(200),
address address2_t,
DOB date,
)NOT FINAL;
CREATE OR REPLACE TYPE PROGRAMME_P AS OBJECT(
programme_id char(4),
programme_title varchar2(20),
dept_id varchar2(20),
consists_of module_list_t,
contains student_list_t,
MEMBER FUNCTION
number_of_students RETURN NUMBER);
CREATE OR REPLACE TYPE BODY PROGRAMME_P AS
MEMBER FUNCTION number_of_students RETURN NUMBER IS
Value NUMBER;
BEGIN
Value:=SELF.consists_of.count;
RETURN value;
END;
END;
CREATE OR REPLACE TYPE STUDENT_LIST_T AS TABLE OF REF student_t;
CREATE OR REPLACE TYPE STUDENT_T UNDER person2_t (
is_enrolled_on REF programme_p,
MEMBER FUNCTION
age RETURN NUMBER
)FINAL;
CREATE OR REPLACE TYPE BODY STUDENT_T AS
MEMBER FUNCTION age RETURN NUMBER IS
Value NUMBER;
BEGIN
Value := (SYSDATE -self.dob)/365;
RETURN value;
END;
END;
CREATE TABLE MODULE_TAB OF MODULE_T
(     SCOPE FOR ("IS_PART_OF") IS "PROGRAMME_TAB" ,
     PRIMARY KEY ("MODULE_ID") ENABLE
CREATE TABLE PERSON2_TAB OF PERSON2_T
( pname PRIMARY KEY);
CREATE TABLE PROGRAMME_TAB OF PROGRAMME_P
(PRIMARY KEY programme_id)
NESTED TABLE CONSISTS_OF STORE AS MODULE_NEST_TAB;
CREATE TABLE PROGRAMME_TAB OF PROGRAMME_P
(PRIMARY KEY programme_id)
NESTED TABLE CONTAINS STORE AS STUDENT_NEST_TAB;
yes its using nested tables, I have a pdf that explains to a degree but am looking for a real idiots (not dummies) guide to object orientated approach to database within oracle
the code works to a degree using sqlplus but if i try the graphical interface ,shows no table data
regards