This document contains tables representing suppliers (S), parts (P), jobs (J), and a join table of supplier-part-job (SPJ) records with shipment quantities. It also includes exercises to query and update these tables, such as finding suppliers by name/location criteria, calculating total shipment quantities by supplier, and modifying records.

1. J
j_num
jname
city
j1
Sorter
Paris
j2
Punch
Rome
j3
Reader
Athens
j4
Console
Athens
j5
Collator
London
j6
Terminal
Oslo
j7
Tape
London
P
p_num
pname
color
weight
city
p1
Nut
Red
12

2. London
p2
Bolt
Green
17
Paris
p3
Screw
Blue
17
Rome
p4
Screw
Red
14
London
p5
Cam
Blue
12
Paris
p6
Cog
Red
19
London
S
s_num
s_name
status
city
s1
Smith
20
London
s2

3. Jones
10
Paris
s3
Blake
30
Paris
s4
Clark
20
London
s5
Adams
30
Athens
SPJ
s_num
p_num
j_num
qty
s1
p1
j1
200
s1
p1
j4
700
s2
p3
j1
400
s2
p3
j2
200

4. s2
p3
j3
200
s2
p3
j4
500
s2
p3
j5
600
s2
p3
j6
400
s2
p3
j7
800
s2
p5
j2
100
s3
p3
j1
200
s3
p4
j2
500
s4
p6
j3
300

5. s4
p6
j7
300
s5
p1
j4
100
s5
p2
j2
200
s5
p2
j4
100
s5
p3
j4
200
s5
p4
j4
800
s5
p5
j4
400
s5
p5
j5
500
s5
p5
j7
100

6. s5
p6
j2
200
s5
p6
j4
500
Note: Qty, status, and weight are numbers.
Exercise
1. Get supplier names and numbers for all suppliers who supplied part P3 and whose name
begins with letter A.
2. Get supplier names and numbers for all suppliers whose name (supplier name) begins with
letter A and who supplied parts whose name (part’s name) begins with setter S.
3. Get supplier names for suppliers who supplied for job J2. (Use a sub query)
4. Get supplier names for suppliers who supplied parts for jobs only in Athens. (Use sub query)
5. Get part names for parts that are not supplied for job J3. (Use a sub query)
6. Get supplier numbers for suppliers with status lower than that of supplier S1.
7. Get supplier numbers and names for suppliers whose status is greater than status values of all
suppliers in located Paris.
8. Calculate each supplier’s total sales quantity and get the sales person’s name if the sales
person supplies parts more than 1000 units in total.
9. Get job numbers for jobs whose city is first in the alphabetical list of the job cities.
10. Increase the status values of suppliers by 5 who are located in Paris.
Please hand in the modified table and the query.
11. Change the name to ‘Hammer’ of parts that are Red and located in London and whose name
was Screw.
Please hand in the modified table and the query.
12. Delete all jobs in Rome and all corresponding part shipments. (Please use 2 queries)
Please hand in the modified table and the query.
13. Smith moved to Adam’s location. Please update Smith’s city but do not use the city name
directly.
14. Please create a “view table” supplier_shipment that shows each supplier and its total
shipment quantity. (if the system do not allow you to create a view table then skip this question)
15. Please try to increase Smith’s total shipment by 100 in the view table you created in question
14. Then discuss what happens when you try to update the view table. (if question 14 is

7. successful)
16. Please create a base table supplier_shipment that shows each supplier and its total shipments
from S and SPJ tables.
17. Please repeat question 15 on the base table supplier_shipment and discuss the result.
Note: You might need following setting before run your update SQL
SET SQL_SAFE_UPDATES = 0;
j_num
jname
city
j1
Sorter
Paris
j2
Punch
Rome
j3
Reader
Athens
j4
Console
Athens
j5
Collator
London
j6
Terminal
Oslo
j7
Tape
London
Solution
If you have any doubts, please give me comment...
-- 1. Get supplier names and numbers for all suppliers who supplied part P3 and whose name
begins with letter A.

8. SELECT s_name, s_num
FROM S INNER JOIN SPJ ON S.s_num = SPJ.s_num
WHERE s_name LIKE 'A%' AND p_num = P3;
-- 2. Get supplier names and numbers for all suppliers whose name (supplier name) begins with
letter A and who supplied parts whose name (part’s name) begins with setter S.
SELECT s_name, s_num
FROM (S INNER JOIN SPJ ON S.s_num = SPJ.s_num) INNER JOIN P ON SPJ.p_num =
P.p_num
WHERE s_name LIKE 'A%' AND pname = 'S%';
-- 3. Get supplier names for suppliers who supplied for job J2. (Use a sub query)
SELECT s_num
FROM S
WHERE s_num IN(
SELECT s_num
FROM SPJ
WHERE j_num = 'j2'
);
-- 4. Get supplier names for suppliers who supplied parts for jobs only in Athens. (Use sub
query)
SELECT s_num
FROM (S INNER JOIN SPJ ON S.s_num = SPJ.s_num) INNER JOIN J ON SPJ.j_num =
J.j_num
WHERE J.city = 'Athens' AND s_num NOT IN(
SELECT s_num
FROM (S INNER JOIN SPJ ON S.s_num = SPJ.s_num) INNER JOIN J ON SPJ.j_num =
J.j_num
WHERE J.city <> 'Athens'
);
-- 5. Get part names for parts that are not supplied for job J3. (Use a sub query)
SELECT pname
FROM P
WHERE p_num NOT IN(
SELECT p_num
FROM SPJ
WHERE p_num = 'j3'
);

9. -- 6. Get supplier numbers for suppliers with status lower than that of supplier S1.
SELECT s_num
FROM S
WHERE status < (
SELECT status
FROM S
WHERE s_num = 's1'
);
-- 7. Get supplier numbers and names for suppliers whose status is greater than status values of
all suppliers in located Paris.
SELECT s_num, sname
FROM S
WHERE status > ALL(
SELECT status
FROM S
WHERE city = Paris
);
-- 8. Calculate each supplier’s total sales quantity and get the sales person’s name if the sales
person supplies parts more than 1000 units in total.
SELECT S.s_num, s_name, SUM(qty)
FROM S INNER JOIN SPJ ON S.s_num = SPJ.s_num
GROUP BY S.s_num,s_name
HAVING SUM(qty)>1000;
-- 9. Get job numbers for jobs whose city is first in the alphabetical list of the job cities.
SELECT j_num
FROM J
WHERE j_num IN(
SELECT j_num
FROM J
ORDER BY city
LIMIT 1
);
-- 10. Increase the status values of suppliers by 5 who are located in Paris.
-- Please hand in the modified table and the query.
UPDATE S SET status = status+5 WHERE city ='Paris';
SELECT *

10. FROM S;
-- 11. Change the name to ‘Hammer’ of parts that are Red and located in London and whose
name was Screw.
-- Please hand in the modified table and the query.
UPDATE P SET pname = 'Hammer' WHERE color = 'Red' AND city ='London' AND
pname='Screw';
SELECT *
FROM P;
-- 12. Delete all jobs in Rome and all corresponding part shipments. (Please use 2 queries)
-- Please hand in the modified table and the query.
DELETE FROM SPJ WHERE j_num IN (
SELECT j_num
FROM J
WHERE city = 'Rome'
);
DELETE FROM J WHERE city ='Rome';
-- 13. Smith moved to Adam’s location. Please update Smith’s city but do not use the city name
directly.
UPDATE S SET city = (SELECT city FROM S WHERE s_name='Adams') WHERE
s_name='Smith';
-- 14. Please create a “view table” supplier_shipment that shows each supplier and its total
shipment quantity. (if the system do not allow you to create a view table then skip this question)
CREATE VIEW supplier_shipment AS
SELECT s_num, SUM(qty) AS qty
FROM SPJ
GROUP s_num;
-- 15. Please try to increase Smith’s total shipment by 100 in the view table you created in
question 14. Then discuss what happens when you try to update the view table. (if question 14 is
successful)
UPDATE supplier_shipment SET qty = qty +100;
-- 16. Please create a base table supplier_shipment that shows each supplier and its total
shipments from S and SPJ tables.
DESCRIBE supplier_shipment;