Here's the code :
DROP TABLE FILM CASCADE CONSTRAINTS;
DROP TABLE COMPANY CASCADE CONSTRAINTS;
DROP TABLE MAIN_ACTOR CASCADE CONSTRAINTS;
DROP TABLE DIRECTOR CASCADE CONSTRAINTS;
CREATE TABLE FILM (
Film_ID NUMBER(4) PRIMARY KEY,
Title VARCHAR2(35) NOT NULL,
Year Date NOT NULL,
Language VARCHAR2(20),
Director_ID NUMBER(4) NOT NULL,
Actor_ID NUMBER(4) NOT NULL,
Company_ID NUMBER(4) NOT NULL,
Genre NUMBER(4) NOT NULL,
FOREIGN KEY (Director_ID) REFERENCES DIRECTOR(Director_ID),
FOREIGN KEY (Actor_ID) REFERENCES MAIN_ACTOR(Main_Actor_ID),
FOREIGN KEY (Company_ID) REFERENCES COMPANY(Company_ID)
);
CREATE TABLE COMPANY (
Company_ID NUMBER(4) PRIMARY KEY,
Company_Name VARCHAR2(20) NOT NULL,
Company_Country VARCHAR2(20) NOT NULL
);
CREATE TABLE MAIN_ACTOR (
Main_Actor_ID NUMBER(4) PRIMARY KEY,
First_Name VARCHAR2(20) NOT NULL,
Last_Name VARCHAR2(20) NOT NULL,
Birthday Date NOT NULL,
Country VARCHAR2(20)
);
CREATE TABLE DIRECTOR (
Director_ID NUMBER(4) PRIMARY KEY,
Director_First_Name VARCHAR2(20),
Director_Last_Name VARCHAR2(20) NOT NULL,
Director_BD Date,
Country VARCHAR2(20) NOT NULL
);
and the error I get is :
Line 6
Error report -
ORA-00942: table or view does not exist
00942. 00000 - "table or view does not exist"
So I searched and I found nothing. All error like this seems to happen when you call a select with the wrong permissions but here on a simple call on CREATE TABLE gives me this error.
So I tried to drop it and eventually re- create it but nothing changed.
You refer in your foreign constraints to table that are not created so change the sequence.
First tables without foreign constraints and after table that refer to these tables
DROP TABLE FILM CASCADE CONSTRAINTS;
DROP TABLE COMPANY CASCADE CONSTRAINTS;
DROP TABLE MAIN_ACTOR CASCADE CONSTRAINTS;
DROP TABLE DIRECTOR CASCADE CONSTRAINTS;
CREATE TABLE DIRECTOR (
Director_ID NUMBER(4) PRIMARY KEY,
Director_First_Name VARCHAR2(20),
Director_Last_Name VARCHAR2(20) NOT NULL,
Director_BD Date,
Country VARCHAR2(20) NOT NULL
);
CREATE TABLE MAIN_ACTOR (
Main_Actor_ID NUMBER(4) PRIMARY KEY,
First_Name VARCHAR2(20) NOT NULL,
Last_Name VARCHAR2(20) NOT NULL,
Birthday Date NOT NULL,
Country VARCHAR2(20)
);
CREATE TABLE COMPANY (
Company_ID NUMBER(4) PRIMARY KEY,
Company_Name VARCHAR2(20) NOT NULL,
Company_Country VARCHAR2(20) NOT NULL
);
CREATE TABLE FILM (
Film_ID NUMBER(4) PRIMARY KEY,
Title VARCHAR2(35) NOT NULL,
Year Date NOT NULL,
Language VARCHAR2(20),
Director_ID NUMBER(4) NOT NULL,
Actor_ID NUMBER(4) NOT NULL,
Company_ID NUMBER(4) NOT NULL,
Genre NUMBER(4) NOT NULL,
FOREIGN KEY (Director_ID) REFERENCES DIRECTOR(Director_ID),
FOREIGN KEY (Actor_ID) REFERENCES MAIN_ACTOR(Main_Actor_ID),
FOREIGN KEY (Company_ID) REFERENCES COMPANY(Company_ID)
);
Because you cascaded down to constraints in your drop query, the foreign key constraints for Director_ID, ACTOR_ID and Company_ID have been affected and also as those tables were also dropped the Create query for FILM table could not locate those other tables to link the FOREIGN KEYS. You need to run your CREATE queries from down to up so that the FILM table which has the FOREIGN KEYS to other tables be created last and the REFERENTIAL KEYS be re-established.
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