Need Help Question 2 (4 points) HAPPY INSURANCE Observe the HAPPY INSURANCE DATA

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Question 2 (4 points) HAPPY INSURANCE Observe the HAPPY INSURANCE DATABASE: CLIENT ClientiD ClientName ClientAgent ClientSpouseName C111 Tom A1 Jenny C222 Karin A1 Bilf C333 Cole A2 Amy C444 Dorothy A2 C555 Andy A3 Amy C666 Tina A3 Matt C777 Christina A4 Mike AGENT AgentiD AgentName AgentArea AgentRating AgentYearOfHire SupervisedBy A1 Kate 1 101 1990 A2 Amy 2 92 2009 A1 A3 Luke 3 100 1992 A4 James 3 90 2010 A3 AREA ArealD AreaNameAreaHQ 1 East Boston 2 West San Francisco 3 Central Chicago This database will be used for the following question citing tables from the HAPPY INSURANCE database. If a DBMS enforces a DELETE SET-TO-NULL option on the referential integrity constraint between CLIENT and AGENT in the HAPPY INSURANCE database, what will be the outcome after a user tries to delete the last record (A4, James, 3, 90, 2010, A3)from AGENT? CLIENT will have 7 records AGENT will have 4 records CLIENT will have 6 records AGENT will have 3 records CLIENT will have 7 records AGENT will have 3 records CLIENT will have 6 records AGENT will have 4 records

Explanation / Answer

ANSWER IS

CLIENT will have 7 records

AGENT will have 3 Records

Option C

Execution of HAPPY INSURANCE DATABASE:

CREATE TABLE CLIENT(ClientId integer PRIMARY KEY, ClientName text,ClientAgent text,ClientSpouseName text);

insert into CLIENT(ClientId, ClientName,ClientAgent,ClientSpouseName) values (C111,'TOM','A1','Jenny');

insert into CLIENT(ClientId, ClientName,ClientAgent,ClientSpouseName) values ('C222','Karin','A1','Bill');

insert into CLIENT(ClientId, ClientName,ClientAgent,ClientSpouseName) values ('C333','Cole','A2','Amy');

insert into CLIENT(ClientId, ClientName,ClientAgent,ClientSpouseName) values ('C444','Dorothy','A2','');

insert into CLIENT(ClientId, ClientName,ClientAgent,ClientSpouseName) values ('C555','Andy','A3','Amy');

insert into CLIENT(ClientId, ClientName,ClientAgent,ClientSpouseName) values ('C666','Tina','A3','Matt');

insert into CLIENT(ClientId, ClientName,ClientAgent,ClientSpouseName) values ('C777','Christina','A4','Mike');

Number of Records: 7

ClientId

ClientName

ClientAgent

ClientSpouseName

C111

TOM

A1

Jenny

C222

Karin

A1

Bill

C333

Cole

A2

Amy

C444

Dorothy

A2

C555

Andy

A3

Amy

C666

Tina

A3

Matt

C777

Christina

A4

Mike

CREATE TABLE AGENT(AgentId text references CLIENT(ClientAgent) on delete set NULL, AgentName text,AgentArea text,AgentRating text,AgentYearofHire text,SupervisedBy text);

insert into AGENT(AgentId,AgentName,AgentArea,AgentRating,AgentYearofHire,SupervisedBy) values ('A1','KATE','1','101','1990','');

insert into AGENT(AgentId,AgentName,AgentArea,AgentRating,AgentYearofHire,SupervisedBy) values ('A2','AMY','2','92','2009','A1');

insert into AGENT(AgentId,AgentName,AgentArea,AgentRating,AgentYearofHire,SupervisedBy) values ('A3','LUKE','3','100','1992','');

insert into AGENT(AgentId,AgentName,AgentArea,AgentRating,AgentYearofHire,SupervisedBy) values ('A4','JAMES','3','90','2010','A3');

Number of Records: 4

AgentId

AgentName

AgentArea

AgentRating

AgentYearofHire

SupervisedBy

A1

KATE

1

101

1990

A2

AMY

2

92

2009

A1

A3

LUKE

3

100

1992

A4

JAMES

3

90

2010

A3

CREATE TABLE AREA(AreaID integer PRIMARY KEY,AreaName text,AreaHQ text);

insert into AREA(AreaID,AreaName,AreaHQ) values (1,'East','Boston');

insert into AREA(AreaID,AreaName,AreaHQ) values (2,'West','San Francisco');

insert into AREA(AreaID,AreaName,AreaHQ) values (3,'Central','Chicogo');

Number of Records: 3

AreaID

AreaName

AreaHQ

1

East

Boston

2

West

San Francisco

3

Central

Chicogo

After Deletion of( 'A4','JAMES','3','90','2010','A3')

delete from AGENT where AgentID='A4'

CLIENT TABLE

Number of Records: 7

ClientId

ClientName

ClientAgent

ClientSpouseName

C111

TOM

A1

Jenny

C222

Karin

A1

Bill

C333

Cole

A2

Amy

C444

Dorothy

A2

C555

Andy

A3

Amy

C666

Tina

A3

Matt

C777

Christina

A4

Mike

AGENT TABLE

Number of Records: 3

AgentId

AgentName

AgentArea

AgentRating

AgentYearofHire

SupervisedBy

A1

KATE

1

101

1990

A2

AMY

2

92

2009

A1

A3

LUKE

3

100

1992

ANSWER IS

CLIENT will have 7 records

AGENT will have 3 Records

Option C

ClientId

ClientName

ClientAgent

ClientSpouseName

C111

TOM

A1

Jenny

C222

Karin

A1

Bill

C333

Cole

A2

Amy

C444

Dorothy

A2

C555

Andy

A3

Amy

C666

Tina

A3

Matt

C777

Christina

A4

Mike

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