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The following statements create and use the database objects that you have created (or will create) for the tutorial in SQL Developer Tutorial: Creating Objects for a Small Database. You can view these commands to help you understand the library database objects that are covered in the tutorial.
-- Clean up from any previous tutorial actions.
DROP TABLE transactions;
DROP TABLE books;
DROP TABLE patrons;
DROP SEQUENCE patron_id_seq;
DROP SEQUENCE transactions_seq;
DROP TRIGGER transactions_trg;
DROP VIEW patrons_trans_view;
DROP PROCEDURE list_a_rating;
DROP PROCEDURE list_a_rating2;
set serveroutput on
-- Create objects.
CREATE TABLE books (
book_id VARCHAR2(20),
title VARCHAR2(50)
CONSTRAINT title_not_null NOT NULL,
author_last_name VARCHAR2(30)
CONSTRAINT last_name_not_null NOT NULL,
author_first_name VARCHAR2(30),
rating NUMBER,
CONSTRAINT books_pk PRIMARY KEY (book_id),
CONSTRAINT rating_1_to_10 CHECK (rating IS NULL OR
(rating >= 1 and rating <= 10)),
CONSTRAINT author_title_unique UNIQUE (author_last_name, title));
CREATE TABLE patrons (
patron_id NUMBER,
last_name VARCHAR2(30)
CONSTRAINT patron_last_not_null NOT NULL,
first_name VARCHAR2(30),
street_address VARCHAR2(50),
city_state_zip VARCHAR2(50),
location MDSYS.SDO_GEOMETRY,
CONSTRAINT patrons_pk PRIMARY KEY (patron_id));
CREATE TABLE transactions (
transaction_id NUMBER,
patron_id CONSTRAINT for_key_patron_id
REFERENCES patrons(patron_id),
book_id CONSTRAINT for_key_book_id
REFERENCES books(book_id),
transaction_date DATE
CONSTRAINT tran_date_not_null NOT NULL,
transaction_type NUMBER
CONSTRAINT tran_type_not_null NOT NULL,
CONSTRAINT transactions_pk PRIMARY KEY (transaction_id));
CREATE SEQUENCE patron_id_seq
START WITH 100
INCREMENT BY 1;
-- The sequence for the transaction_id
-- in the tutorial is created automatically,
-- and may have the name TRANSACTIONS_SEQ.
CREATE SEQUENCE transactions_seq
START WITH 1
INCREMENT BY 1;
-- The before-insert trigger for transaction ID values
-- in the tutorial is created automatically,
-- and may have the name TRANSACTIONS_TRG.
CREATE OR REPLACE TRIGGER transactions_trg
BEFORE INSERT ON TRANSACTIONS
FOR EACH ROW
BEGIN
SELECT TRANSACTIONS_SEQ.NEXTVAL INTO :NEW.TRANSACTION_ID FROM DUAL;
END;
/
CREATE VIEW patrons_trans_view AS
SELECT p.patron_id,
p.last_name,
p.first_name,
t.transaction_type,
t.transaction_date
FROM patrons p, transactions t
WHERE p.patron_id = t.patron_id
ORDER BY p.patron_id, t.transaction_type;
-- Procedure: List all books that have a specified rating.
CREATE OR REPLACE PROCEDURE list_a_rating(in_rating IN NUMBER) AS
matching_title VARCHAR2(50);
TYPE my_cursor IS REF CURSOR;
the_cursor my_cursor;
BEGIN
OPEN the_cursor
FOR 'SELECT title
FROM books
WHERE rating = :in_rating'
USING in_rating;
DBMS_OUTPUT.PUT_LINE('All books with a rating of ' || in_rating || ':');
LOOP
FETCH the_cursor INTO matching_title;
EXIT WHEN the_cursor%NOTFOUND;
DBMS_OUTPUT.PUT_LINE(matching_title);
END LOOP;
CLOSE the_cursor;
END;
/
show errors;
-- Insert and query data.
INSERT INTO books VALUES ('A1111', 'Moby Dick', 'Melville', 'Herman', 10);
INSERT INTO books VALUES ('A2222', 'Get Rich Really Fast', 'Scammer', 'Ima', 1);
INSERT INTO books VALUES ('A3333', 'Finding Inner Peace', 'Blissford', 'Serenity', null);
INSERT INTO books VALUES ('A4444', 'Great Mystery Stories', 'Whodunit', 'Rodney', 5);
INSERT INTO books VALUES ('A5555', 'Software Wizardry', 'Abugov', 'D.', 10);
INSERT INTO patrons VALUES (patron_id_seq.nextval,
'Smith', 'Jane', '123 Main Street', 'Mytown, MA 01234', null);
INSERT INTO patrons VALUES (patron_id_seq.nextval,
'Chen', 'William', '16 S. Maple Road', 'Mytown, MA 01234', null);
INSERT INTO patrons VALUES (patron_id_seq.nextval,
'Fernandez', 'Maria', '502 Harrison Blvd.', 'Sometown, NH 03078', null);
INSERT INTO patrons VALUES (patron_id_seq.nextval,
'Murphy', 'Sam', '57 Main Street', 'Mytown, MA 01234', null);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (100, 'A1111', SYSDATE, 1);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (100, 'A2222', SYSDATE, 2);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (101, 'A3333', SYSDATE, 3);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (101, 'A2222', SYSDATE, 1);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (102, 'A3333', SYSDATE, 1);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (103, 'A4444', SYSDATE, 2);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (100, 'A4444', SYSDATE, 1);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (102, 'A2222', SYSDATE, 2);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (102, 'A5555', SYSDATE, 1);
INSERT INTO transactions (patron_id, book_id,
transaction_date, transaction_type)
VALUES (101, 'A2222', SYSDATE, 1);
-- Test the view and the procedure.
SELECT * FROM patrons_trans_view;
CALL list_a_rating(10);