Chapter 3
pg. 123 Hands-On Assignments Part II
3-9 : Retrieving Pledge Totals
Create a PL/SQL block that retrieves and displays information for a specific project based on Project
ID. Display the following on a single row of output: project ID, project name, number of pledges
made, total dollars pledged, and the average pledge amount.
3-9
set serveroutput on
DECLARE
proj_name
proj_id
pledge_count
pledge_average
pledge_sum
dd_project.projname%type;
dd_project.idproj%type;
dd_pledge.pledgeamt%type;
dd_pledge.pledgeamt%type;
dd_pledge.pledgeamt%type;
BEGIN
SELECT dd_project.idproj, projname, count(pledgeamt), sum(pledgeamt), avg(pledgeamt)
into proj_id, proj_name, pledge_count, pledge_sum, pledge_average
from dd_pledge, dd_project
where dd_pledge.idproj = dd_project.idproj
and dd_project.idproj = &proj_id
group by dd_project.idproj, projname;
DBMS_OUTPUT.PUT_LINE(
'Project ID: ' || proj_id
||' Project Name: ' || proj_name
||' Total Pledges Made: ' || pledge_count
||' Total Dollars Pledged: ' || pledge_sum
||' Average Dollars Pledged: ' || pledge_average
);
end;
Example 1 (501)
Project ID: 501 Project Name: Community food pantry #21 freezer equipment Total Pledges Made: 5
Total Dollars Pledged: 4060 Average Dollars Pledged: 812
Example 2 (500)
Project ID: 500 Project Name: Elders Assistance League Total Pledges Made: 3 Total Dollars Pledged: 190
Average Dollars Pledged: 63.33
-------------------------Project information:
SELECT dd_project.idproj, projname, count(pledgeamt), sum(pledgeamt), avg(pledgeamt)
-- into proj_id, proj_name, pledge_count, pledge_sum, pledge_average
from dd_pledge, dd_project
where dd_pledge.idproj = dd_project.idproj
-- and dd_project.idproj = &proj_id
group by dd_project.idproj, projname
order by dd_project.idproj;
IDPROJ PROJNAME
COUNT(PLEDGEAMT) SUM(PLEDGEAMT)
AVG(PLEDGEAMT)
---------- ------------------------------------------------------------ ---------------- -------------- -------------500 Elders Assistance League
3
190
63.3333333
501 Community food pantry #21 freezer equipment 5
4060 812
503 Animal shelter Vet Connect Program
2
840
420
504 Shelter Share Project 2013
3
2040 680
===========================
3-10
Adding a Project
Create a PL/SQL block to handle adding a new project. Create and use a sequence named
DD_PROJID_SEQ to handle generating and populating the project ID. The first number issued by this
sequence should be 530, and no caching should be used. Use a record variable to handle the data to
be added. Data for the new row should be the following: project name = HK Animal Shelter Extension,
start = 1/1/2013, end 5/31/2013, and fundraising goal = $65,000. Any columns not addressed in the
data list are currently unknown.
set serveroutput on
--after the first running of this create sequence code, I would delete/comment it out.
CREATE SEQUENCE dd_project_seq
MINVALUE 1
START WITH 530
INCREMENT BY 1
NOCACHE;
Declare
TYPE type_project IS RECORD(
project_name
dd_project.projname%type := 'HK Animal Shelter Extension',
project_start
dd_project.projstartdate%type := '01-JAN-13',
project_end
dd_project.projenddate%type := '31-MAY-13',
project_funding
new_project
dd_project.projfundgoal%type := '65000');
type_project;
Begin
INSERT INTO
VALUES
dd_project (idproj, projname, projstartdate, projenddate, projfundgoal)
(dd_project_seq.NEXTVAL, new_project.project_name, new_project.project_start,
new_project.project_end, new_project.project_funding);
commit;
end;
------------OUTPUT-----------sequence DD_PROJECT_SEQ created.
anonymous block completed
select * from dd_project;
IDPROJ
PROJNAME
PROJSTARTDATE
PROJENDDATE
PROJFUNDGOAL
PROJCOORD
---------------------------------------------------------------------------------------------------------------------------------------------------------------------------------500
Elders Assistance League
01-SEP-12
31-OCT-12
15000
Shawn Hasee
501
Community food pantry #21 freezer equipment 01-OCT-12
31-DEC-12
65000
Shawn Hasee
502
Lang Scholarship Fund
01-JAN-13
01-NOV-13
100000 Traci Brown
503
Animal shelter Vet Connect Program
01-DEC-12
30-MAR-13
25000
Traci Brown
504
Shelter Share Project 2013
01-FEB-13
31-JUL-13
35000
Traci Brown
530
HK Animal Shelter Extension
01-JAN-13
31-MAY-13
65000
6 rows selected
Note:
select * from dd_project;
A simple way to do:
INSERT INTO dd_project (idproj, projname, projstartdate, projenddate, projfundgoal)
VALUES
(dd_project_seq.NEXTVAL, 'HK Animal Shelter Extension', to_date('01-JAN-13'),
to_date('01-JAN-13'), 65000);
To Drop a sequence:
drop sequence DD_PROJECT_SEQ;
to delete a row:
delete from dd_project where idproj = 530
3-11 : Retrieving and Displaying Pledge Data
Create a PL/SQL block to retrieve and display data for all pledges made in a specified month.
One row of output should be displayed for each pledge. Include the following in each row of output:
* Pledge ID, donor ID, and pledge amount
* If the pledge is being paid in a lump sum, display “Lump Sum.”
* If the pledge is being paid in monthly payments, display “Monthly - #” (with the #
representing the number of months for payment).
* The list should be sorted to display all lump sum pledges first.
SET SERVEROUTPUT ON
DECLARE
PLEDGES
START_MONTH_DATE
END_MONTH_DATE
DD_PLEDGE%ROWTYPE;
DD_PLEDGE.PLEDGEDATE%TYPE := '01-OCT-12';
DD_PLEDGE.PLEDGEDATE%TYPE := '31-OCT-12';
BEGIN
FOR PLEDGES IN
(SELECT IDPLEDGE, IDDONOR, PLEDGEAMT, CASE
WHEN PAYMONTHS = 0 THEN 'Lump Sum.'
ELSE 'Monthly - ' || PAYMONTHS
END AS MONTHLY_PAYMENT
FROM DD_PLEDGE
WHERE PLEDGEDATE >= START_MONTH_DATE AND PLEDGEDATE <= END_MONTH_DATE
ORDER BY PAYMONTHS)
LOOP
DBMS_OUTPUT.PUT_LINE('Pledge ID: ' || PLEDGES.IDPLEDGE || ', Donor ID: '
|| PLEDGES.IDDONOR || ', Pledge Amount: ' ||to_char(PLEDGES.PLEDGEAMT,
'$9999.99') || ', Monthly Payments: ' || PLEDGES. MONTHLY_PAYMENT);
END LOOP;
END;
anonymous block completed
Pledge ID: 102, Donor ID: 310, Pledge Amount:
Pledge ID: 103, Donor ID: 307, Pledge Amount:
Pledge ID: 106, Donor ID: 301, Pledge Amount:
Pledge ID: 105, Donor ID: 309, Pledge Amount:
Pledge ID: 104, Donor ID: 308, Pledge Amount:
Pledge ID: 107, Donor ID: 302, Pledge Amount:
$500.00, Monthly Payments: Lump Sum.
$2000.00, Monthly Payments: Lump Sum.
$75.00, Monthly Payments: Lump Sum.
$120.00, Monthly Payments: Monthly - 12
$240.00, Monthly Payments: Monthly - 12
$1200.00, Monthly Payments: Monthly – 24
-----------------------desc DD_PLEDGE;
SELECT IDPLEDGE, IDDONOR, PLEDGEAMT, PAYMONTHS,
CASE WHEN PAYMONTHS = 0 THEN 'Lump Sum.'
ELSE 'Monthly - ' || PAYMONTHS
END AS MONTHLY_PAYMENT
FROM DD_PLEDGE
--WHERE PLEDGEDATE >= START_MONTH_DATE AND PLEDGEDATE <= END_MONTH_DATE
ORDER BY PAYMONTHS
IDPLEDGE IDDONOR PLEDGEAMT PAYMONTHS MONTHLY_PAYMENT
---------- ---------- ---------- ---------- -------------------------------------------------100
303
80
0 Lump Sum.
101
304
35
0 Lump Sum.
102
310
500
0 Lump Sum.
103
307
2000
0 Lump Sum.
106
301
75
0 Lump Sum.
111
306
1500
0 Lump Sum.
112
309
240
12 Monthly - 12
109
301
360
12 Monthly - 12
110
303
300
12 Monthly - 12
105
309
120
12 Monthly - 12
104
308
240
12 Monthly - 12
107
302
1200
24 Monthly - 24
108
308
480
24 Monthly - 24
13 rows selected
3-12 : Retrieving a Specific Pledge
Create a PL/SQL block to retrieve and display information for a specific pledge. Display the pledge ID,
donor ID, pledge amount, total paid so far, and the difference between the pledged amount and the
total paid amount.
SET SERVEROUTPUT ON
DECLARE
PLEDGES
DD_PLEDGE%ROWTYPE;
TOTAL_PLEDGE_TO_PAY
DD_PLEDGE.PLEDGEAMT%TYPE;
BALANCE
DD_PLEDGE.PLEDGEAMT%TYPE;
MONTHS_PAID NUMBER (5);
BEGIN
SELECT *
INTO PLEDGES
FROM DD_PLEDGE
WHERE IDPLEDGE =& PLEDGE_ID;
MONTHS_PAID := PLEDGES.PAYMONTHS;
IF PLEDGES.PAYMONTHS = 0 THEN
TOTAL_PLEDGE_TO_PAY := PLEDGES.PLEDGEAMT;
ELSE TOTAL_PLEDGE_TO_PAY := MONTHS_PAID * (PLEDGES.PLEDGEAMT/PLEDGES.PAYMONTHS);
END IF;
BALANCE := PLEDGES.PLEDGEAMT - TOTAL_PLEDGE_TO_PAY;
DBMS_OUTPUT.PUT_LINE('Pledge ID: ' || PLEDGES.IDPLEDGE || ', Donor ID: ' || PLEDGES.IDDONOR
||
', Amount paid: ' || TOTAL_PLEDGE_TO_PAY || ' ' || ', Balance: ' || BALANCE);
END;
Insert value: 100
anonymous block completed
Pledge ID: 100, Donor ID: 303, Amount paid: 80 , Balance: 0
Insert value: 105
Pledge ID: 105, Donor ID: 309, Amount paid: 120 , Balance: 0
3-13 : Modifying Data
Create a PL/SQL block to modify the fundraising goal amount for a specific project. In addition, display
the following information for the project being modified: project name, start date, previous
fundraising goal amount, and new fundraising goal amount.
SET SERVEROUTPUT ON
DECLARE
PROJECT_NAME
DATE_START
FUNDRAISING_GOAL
PROJECT_ID
NEW_FUNDRAISING_GOAL
DD_PROJECT.PROJNAME%TYPE;
DD_PROJECT.PROJSTARTDATE%TYPE;
DD_PROJECT.PROJFUNDGOAL%TYPE;
DD_PROJECT.IDPROJ%TYPE := '502';
DD_PROJECT.PROJFUNDGOAL%TYPE := '250000';
BEGIN
SELECT PROJNAME, PROJSTARTDATE, PROJFUNDGOAL
INTO PROJECT_NAME, DATE_START, FUNDRAISING_GOAL
FROM DD_PROJECT
WHERE IDPROJ = PROJECT_ID;
UPDATE DD_PROJECT
SET PROJFUNDGOAL = NEW_FUNDRAISING_GOAL;
DBMS_OUTPUT.PUT_LINE('Project Name: ' || PROJECT_NAME ||', Start Date: ' ||
DATE_START || ', Previous Goal: ' || FUNDRAISING_GOAL || ', New Goal: ' ||
NEW_FUNDRAISING_GOAL);
END;
anonymous block completed
Project Name: Lang Scholarship Fund, Start Date: 01-JAN-13, Previous Goal: 100000, New Goal:
250000