Lekcija 9 ukljucuje kompleksnije primjere MySQl baza, join-ove, foreign key-eve, entity relation ship diagram.

1. PHP za početnike
Academy387
Nermin Šehić
Predavanje 9

2. Recap: predavanje 8
• Baze podataka
• DBMS
• Tabele
• Redovi
• Kolone
• Atributi
• Primary key
• Foreign key
• Query

3. Dodavaje foreign key-a
ALTER TABLE child_table_name
ADD FOREIGN KEY (foreign_key_name)
REFERENCES parent_table_name (table_id)

4. Vjezba 1
• Napraviti novu bazu blog
• Napraviti dvije table author i article
• U tabeli author dodati polja id, name, email, pop
• U tabeli article dodati polja id, title, text, author_id
• Polje author_id u tabeli article je foreign key od tabele
author
• Uraditi dva INSERT query-a u tabelu author

5. JOINS
• Inner join
• Left join
• Right join
• Outer join

6. id name course_fk
1 John Doe 1
2 Foo Bar 3
3
Branko
Copic
5
id name
1 HTML5
2 PHP
3 CSS

7. INNER JOIN
SELECT user.name, course.name
FROM `user`
INNER JOIN `course` on user.course = course.id;

8. LEFT JOIN
SELECT user.name, course.name
FROM `user`
LEFT JOIN `course` on user.course = course.id;

9. RIGHT JOIN
SELECT user.name, course.name
FROM `user`
RIGHT JOIN `course` on user.course = course.id;

10. OUTER JOIN

11. OUTER JOIN
SELECT user.name, course.name|
FROM `user`
LEFT JOIN `course` on user.course = course.id
UNION
SELECT user.name, course.name
FROM `user`
RIGHT JOIN `course` on user.course = course.id;

12. Alternativni pristup
• SELECT * FROM table1, table2 WHERE table2.fk
= table1.pk
• fk - foreign key
• pk - primary key

13. Primer 1
• Dodavanje u tabelu sa foreign key-em
• INSERT INTO table_name (column1, column2,
foreign_key) VALUES (value1, value2,
foreign_key_value)

14. Vjezba 2
• Koristeci bazu iz vjezbe 1, dodati u tabelu article
2 reda sa razliciom fk referencom
• Koristeci jedan od join metoda uraditi SELECT
query

15. ERD
• Entity relationship diagram
• Koristi se za vizuelnu prezentaciju baze, njenih
atributa i veza medju tabelama

16. Primjer ERD

17. Vjezba 3
• Koristeci bazu iz vjezbi 1 i 2 i nacrtati ERD

18. Vjezba 4
• Isprogramirati bazu na osnovu zadanog ERD

19. Vjezba 4

20. Korisne MySQL komande
• SELECT * FROM tableName LIMIT 30
• SELECT COUNT(pk) FROM tableName
• SELECT COUNT(id) as count FROM author

21. Korisne MySQL komande
• SELECT * FROM tableName ORDER BY pk
DESC
• SELECT * FROM tableName ORDER BY pk ASC
• SELECT tN.pk FROM tableName tN

22. To sum up…
• Dodavanje FK constraint-a
• Left join
• Right join
• Inner join
• Outer join
• ERD
• MySQL Komande

23. Pitanja?

24. • Naredno predavanje: 10.11.2015
• http://www.slideshare.net/NerminSehic/php-za-
pocetnike-predavanje-9