1. Chapter (7): Advanced SQL
SELECT Statement
Chapter (7): Advanced SQL

2. Find names of sailors who’ve reserved boat #103
Reserves
SELECT sname
FROM Sailors, Reserves
WHERE Sailors.sid=Reserves.sid AND bid=103

3. Find names of sailors who’ve reserved boat #103
Reserves
SELECT S.sname
FROM Sailors S, Reserves R
WHERE S.sid=R.sid AND bid=103

4. CROSS JOIN Sailors Reserves SELECT * FROM Sailors S, Reserves R
FROM Sailors S CROSS JOIN Reserves R

5. INNER-JOIN Sailors Reserves SELECT * FROM Sailors S, Reserves R
WHERE S.sid=R.sid
SELECT *
FROM Sailors S INNER JOIN Reserves R
ON S.sid=R.sid
SELECT *
FROM Sailors S INNER JOIN Reserves R
USING sid

6. EQUI-JOIN Sailors Reserves SELECT * FROM Sailors S, Reserves R
WHERE S.sid=R.sid
SELECT *
FROM Sailors S INNER JOIN Reserves R
ON S.sid=R.sid
SELECT *
FROM Sailors S INNER JOIN Reserves R
USING sid

7. NATURAL-JOIN SELECT * FROM Sailors S INNER JOIN Reserves R USING sid
FROM Sailors S NATURAL JOIN Reserves R
USING sid

8. Report all the sailors with their reservations
LEFT OUTER-JOIN
Report all the sailors with their reservations
SELECT *
FROM Sailors S, Reserves R
WHERE S.sid=R.sid
SELECT *
FROM Sailors S LEFT OUTER JOIN Reserves R
WHERE S.sid=R.sid

9. Report all the sailors with their reservations
LEFT OUTER-JOIN
Report all the sailors with their reservations
SELECT *
FROM Sailors S, Reserves R
WHERE S.sid=R.sid
SELECT *
FROM Sailors S NATURAL LEFT OUTER JOIN Reserves R
WHERE S.sid=R.sid

10. Report all the boats with their reservations
RIGHT OUTER-JOIN
Report all the boats with their reservations
Reserves
Boats
SELECT *
FROM Reserves R RIGHT OUTER-JOIN Boats B
WHERE R.bid=B.bid

11. Find sailors’ names who’ve reserved at least one boat
Reserves
SELECT DISTINCT S.sname
FROM Sailors S, Reserves R
WHERE S.sid=R.sid

12. Find names of sailors who’ve reserved a red or a green boat
SELECT S.sname
FROM Sailors S, Reserves R, Boats B
WHERE S.sid=R.sid AND R.bid=B.bid
AND (B.color=‘red’ OR B.color=‘green’)
SELECT S.sname
FROM Sailors S, Boats B, Reserves R
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘red’
UNION
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘green’

13. Find names of sailors who’ve reserved a red and a green boat
SELECT S.sname
FROM Sailors S, Reserves R, Boats B
WHERE S.sid=R.sid AND R.bid=B.bid
AND (B.color=‘red’ AND B.color=‘green’)
SELECT S.sname
FROM Sailors S, Reserves R, Boats B
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘red’
INTERSECT
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘green’

14. Find names of sailors who’ve reserved a red and a green boat
SELECT S.sid
FROM Sailors S, Boats B, Reserves R
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘red’
AND S.sid IN (SELECT S2.sid
FROM Sailors S2, Boats B2, Reserves R2
WHERE S2.sid=R2.sid AND R2.bid=B2.bid
AND B2.color=‘green’)
SELECT S.sname
FROM Sailors S, Reserves R, Boats B
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘red’
INTERSECT
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘green’

15. Find names of sailors who’ve reserved a red and not a green boat
SELECT S.sid
FROM Sailors S, Boats B, Reserves R
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘red’
AND S.sid NOT IN (SELECT S2.sid
FROM Sailors S2, Boats B2, Reserves R2
WHERE S2.sid=R2.sid AND R2.bid=B2.bid
AND B2.color=‘green’)
SELECT S.sname
FROM Sailors S, Reserves R, Boats B
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘red’
EXCEPT
WHERE S.sid=R.sid AND R.bid=B.bid AND B.color=‘green’

16. SELF-JOIN

17. VIEW CREATE VIEW Emp_Manager AS SELECT * FROM Emp_Manager
SELECT MANAGER
FROM Emp_Manager
SELECT MANAGER
FROM Emp_Manager
WHERE EMPLOYEEID = 123
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