Answer: True
Explanation:
The lines connecting an entity with a relationship whether single or double line refer to another constrain called “Existence Dependency Constraint” (also called “Participation Constraint”).
Answer:
No Answer by by a third jsjshs
Answer:
See explaination
Explanation:
CREATE TABLE CATEGORY
(
cid int NOT NULL,
description varchar2(1000),
PRIMARY KEY (cid)
);
CREATE TABLE PRODUCT
(
pid int NOT NULL,
description varchar2(1000),
cid int,
price int,
p_size varchar2(1),
CONSTRAINT chk_price CHECK (price>0),
CONSTRAINT chk_size CHECK (p_size in ('S','M','L')),
CONSTRAINT fk_cid FOREIGN KEY (cid) REFERENCES CATEGORY(cid)
);
I think it is 3 no? Maybe I dunno but I am confident
