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--Vježba 9 – VIEWS, STORED PROCEDURE, TRIGGERS --NAPOMENA: Vježba se radi nad bazom podataka Pubs. --1. Kreirati proceduru za upis podataka u tabelu authors. Izvršiti proceduru, tj. dodati novog autora sa testnim podacima. USE pubs CREATE PROCEDURE dodaj_autora AS INSERT INTO authors VALUES ('133-53-9929','Smith','Mike','283 555-3353','Neverstreet','Newcity','HC',99966,'True') EXEC dodaj_autora SELECT * FROM authors DROP PROCEDURE dodaj_autora --2. Kreirati proceduru za izmjenu podataka u tabeli authors. Izvršiti proceduru, tj. izmijeniti određene podatke prethodno dodanog autora. USE pubs CREATE PROCEDURE izmjeni_autora AS UPDATE authors SET au_fname='George', au_lname='Martin' WHERE au_id='133-53-9929' EXEC izmjeni_autora SELECT * FROM authors WHERE au_id='133-53-9929' DROP PROCEDURE izmjeni_autora --3. Kreirati proceduru za brisanje zapisa iz tabele authors. Izvršiti proceduru, tj. obrisati prethodno dodanog autora. USE pubs CREATE PROCEDURE brisi_autora AS DELETE FROM authors WHERE au_id='133-53-9929' EXEC brisi_autora SELECT * FROM authors WHERE au_id='133-53-9929' DROP PROCEDURE brisi_autora --4. Izmijeniti proceduru kreiranu u zadatku 1. U istoj proceduri, dodanog autora pridružiti kao koautora na dvije postojeće knjige. -- U proceduri koristiti dvije INSERT komande (Tabele: authors, titleauthor). Izvršiti proceduru, tj. dodati novog autora sa njegovim knjigama. USE pubs CREATE PROCEDURE dodaj_autora AS INSERT INTO authors VALUES ('133-53-9929','Smith','Mike','283 555-3353','Neverstreet','Newcity','HC',99966,'True') INSERT INTO titleauthor VALUES('133-53-9929','PS3333',2,100) EXEC dodaj_autora SELECT * FROM authors DROP PROCEDURE dodaj_autora --5. Kreirati pogled (view) sa sljedećim podacima: naziv izdavača, ime i prezime autora (odvojeno), naziv knjige, zarada od prodaje knjige/a. USE pubs CREATE VIEW autori AS SELECT p.pub_name AS 'Naziv izdavaca',a.au_fname'Ime autora',a.au_lname'Prezime autora',t.title'Naziv knjige',s.qty*t.price AS 'Zarada od prodaje knjige' FROM publishers AS p JOIN titles AS t ON p.pub_id=t.pub_id JOIN titleauthor AS ta ON t.title_id=ta.title_id JOIN authors AS a ON ta.au_id=a.au_id JOIN sales AS S ON S.title_id=t.title_id SELECT * FROM autori DROP VIEW autori --6. Kreirati proceduru koja prima sljedeće parametre: ime i prezime autora, naziv izdavača, naziv knjige. U zavisnosti od proslijeđenog parametra procedura treba da vrati zaradu od prodaje knjige/a. -- Koristiti view kreiran u zadatku 5. CREATE PROCEDURE zarada @imeautora nvarchar(20)='nema vrijednost', @prezimeautora nvarchar(40)='nema vrijednost', @nazivizdavaca nvarchar(40)='nema vrijednost', @nazivknjige nvarchar(80)='nema vrijednost' AS SELECT p.pub_name AS 'Naziv izdavaca',a.au_fname'Ime autora',a.au_lname'Prezime autora',t.title'Naziv knjige',s.qty*t.price AS 'Zarada od prodaje knjige' FROM publishers AS p JOIN titles AS t ON p.pub_id=t.pub_id JOIN titleauthor AS ta ON t.title_id=ta.title_id JOIN authors AS a ON ta.au_id=a.au_id JOIN sales AS S ON S.title_id=t.title_id WHERE a.au_fname LIKE @imeautora OR a.au_lname LIKE @prezimeautora OR p.pub_name LIKE @nazivizdavaca OR t.title LIKE @nazivknjige EXEC zarada @nazivknjige='The Gourmet Microwave' DROP PROCEDURE zarada --7. Kreirati trigger (INSTEAD OF) koji će spriječiti izvršavanje DELETE komande nad tabelom titleauthor. Ukoliko se pokuša obrisati zapis u tabeli titleauthor ispisati odgovarajuću poruku. -- Koristiti komandu PRINT za ispis poruke. CREATE TRIGGER nodelete ON titleauthor INSTEAD OF DELETE AS PRINT 'Zabranjeno brisanje podataka u tabeli author' ROLLBACK DELETE FROM titleauthor WHERE au_id='213-46-8915' DROP TRIGGER nodelete DELETE FROM titleauthor WHERE au_id='213-46-8915' --8. Kreirati proceduru koja briše autora dodanog u zadatku 4, zajedno sa svim njegovim knjigama. Izvršiti proceduru, tj. pokušati obrisati autora. -- Trigger kreiran u zadatku 7 treba da spriječi izvršavanje ove procedure. CREATE PROCEDURE brisiautora AS DELETE titleauthor FROM authors AS a JOIN titleauthor AS ta ON a.au_id=ta.au_id WHERE a.au_id='133-53-9929' DELETE authors FROM authors WHERE au_id='133-53-9929' EXEC brisiautora SELECT * FROM titles AS t JOIN titleauthor AS ta ON t.title_id=ta.title_id JOIN authors AS a ON a.au_id=ta.au_id WHERE a.au_id='133-53-9929'
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