⟩ How To Define a Data Field as NOT NULL?
When defining a specific RECORD type, you can define a data field as NOT NULL to make sure variables with this RECORD type to always have values in this field. A field defined as NOT NULL must have a default value. Here is a tutorial script showing you how to define a data field as NOT NULL:
CREATE OR REPLACE PROCEDURE HELLO AS
TYPE student IS RECORD (
id NUMBER(5) NOT NULL DEFAULT 0,
first_name VARCHAR(80),
last_name VARCHAR(80)
);
best_student student;
another_student student;
class_name VARCHAR2(80);
BEGIN
class_name := 'ggl Center 2006';
best_student.first_name := 'The';
best_student.last_name := 'Best';
DBMS_OUTPUT.PUT_LINE('Best student ID = '
|| best_student.id);
DBMS_OUTPUT.PUT_LINE('Best student = ' ||
best_student.first_name || ' '
|| best_student.last_name);
END;
/
Best student ID = 0
Best student = The Best
