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I Esempio di trigger

I Esempio di trigger. DROP TABLE book1; DROP TABLE book_authors1; CREATE TABLE book1 ( bookid NUMBER(4), title VARCHAR2(25), publishername VARCHAR2(25)); CREATE TABLE book_authors1 ( bookid NUMBER(4), authorname VARCHAR2(20)); COMMIT;.

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I Esempio di trigger

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  1. I Esempio di trigger

  2. DROP TABLE book1; DROP TABLE book_authors1; CREATE TABLE book1 ( bookid NUMBER(4), title VARCHAR2(25), publishername VARCHAR2(25)); CREATE TABLE book_authors1 ( bookid NUMBER(4), authorname VARCHAR2(20)); COMMIT;

  3. CREATE OR REPLACE TRIGGER "GIOVANNA"."INS1" BEFORE INSERT ON "GIOVANNA"."BOOK1" FOR EACH ROW declare ii varchar2(4); begin insert into book_authors1 values(5, 'Anne'); END;

  4. insert into book1 values (76, 'Bill','ooo'); select * from book_authors1; select * from book1;

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