Question

In: Computer Science

CREATE TABLE Hotel ( roomNumber     INTEGER         PRIMARY KEY, type                  CHAR(1

CREATE TABLE Hotel

(

roomNumber     INTEGER         PRIMARY KEY,

type                  CHAR(10)         NOT NULL,

rate                   INTEGER         NOT NULL,

--

CONSTRAINT IC1 CHECK (type IN ('suite', 'king', 'queen')),

CONSTRAINT IC2 CHECK (type <> 'suite' OR rate > 200),

CONSTRAINT IC3 CHECK (NOT (type = 'king' AND (rate < 80 OR rate > 220))),

CONSTRAINT IC4 CHECK (NOT (type = 'queen' AND rate >= 100))

);

which 8 of these inserts will be rejected only 8 are rejected

1.

INSERT INTO Hotel VALUES (21, 'king', 90);
2.

INSERT INTO Hotel VALUES (42, 'suite', 230);
3.

INSERT INTO Hotel VALUES (52, 'suite', 200);
4.

INSERT INTO Hotel VALUES (40, 'queen', 230);
5.

INSERT INTO Hotel VALUES (31, 'king', 50);
6.

INSERT INTO Hotel VALUES (30, 'queen', 50);
7.

INSERT INTO Hotel VALUES (22, 'suite', 90);
8.

INSERT INTO Hotel VALUES (10, 'queen', 210);
9.

INSERT INTO Hotel VALUES (20, 'queen', 90);
10.

INSERT INTO Hotel VALUES (51, 'king', 220);
11.

INSERT INTO Hotel VALUES (41, 'king', 230);
12.

INSERT INTO Hotel VALUES (32, 'suite', 50);
13.

INSERT INTO Hotel VALUES (11, 'king', 210);
14.

INSERT INTO Hotel VALUES (12, 'suite', 210);
15.

INSERT INTO Hotel VALUES (50, 'queen', 100);

Solutions

Expert Solution


1.
INSERT INTO Hotel VALUES (21, 'king', 90); -- not rejected

2.  
INSERT INTO Hotel VALUES (42, 'suite', 230); -- not rejected

3.  
INSERT INTO Hotel VALUES (52, 'suite', 200); -- rejected
Reason : The INSERT statement conflicted with the CHECK constraint "IC2". The conflict occurred in database "master", table "dbo.Hotel".

4.  
INSERT INTO Hotel VALUES (40, 'queen', 230); --rejected
Reason :The INSERT statement conflicted with the CHECK constraint "IC4". The conflict occurred in database "master", table "dbo.Hotel".

5.  
INSERT INTO Hotel VALUES (31, 'king', 50); --rejected
Reason : The INSERT statement conflicted with the CHECK constraint "IC3". The conflict occurred in database "master", table "dbo.Hotel".

6.  
INSERT INTO Hotel VALUES (30, 'queen', 50); -- not rejected

7.  
INSERT INTO Hotel VALUES (22, 'suite', 90); -- rejected
Reason : The INSERT statement conflicted with the CHECK constraint "IC2". The conflict occurred in database "master", table "dbo.Hotel".

8.  
INSERT INTO Hotel VALUES (10, 'queen', 210); -- rejected
Reason: The INSERT statement conflicted with the CHECK constraint "IC4". The conflict occurred in database "master", table "dbo.Hotel".

9.  
INSERT INTO Hotel VALUES (20, 'queen', 90); -- not rejected

10.  
INSERT INTO Hotel VALUES (51, 'king', 220); -- not rejected

11.  
INSERT INTO Hotel VALUES (41, 'king', 230); -- rejected
Reason :The INSERT statement conflicted with the CHECK constraint "IC3". The conflict occurred in database "master", table "dbo.Hotel".

12.  
INSERT INTO Hotel VALUES (32, 'suite', 50); -- rejected
Reason : The INSERT statement conflicted with the CHECK constraint "IC2". The conflict occurred in database "master", table "dbo.Hotel".

13.  
INSERT INTO Hotel VALUES (11, 'king', 210); -- not rejected

14.  
INSERT INTO Hotel VALUES (12, 'suite', 210); -- not rejected

15.  
INSERT INTO Hotel VALUES (50, 'queen', 100); -- rejected
Reason : The INSERT statement conflicted with the CHECK constraint "IC4". The conflict occurred in database "master", table "dbo.Hotel".

venereology answered 7 months ago
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