Summarizes all of the topics that will be on the exam, including SQL (basic, non-monotonic queries, joins, aggregations...) and Database Normalization (functional dependencies, implications, canonical functional dependencies, transformations...)
retrieve addresses return the table with the name and
of all students of persons
SELECT
SELECT P.name C. kind
address ,
FROM Persons P classes c. Takes classes T
FROM students ,
WHERE P id .
= T person.
-
id AND T .
class - id =
C. id
return all students with first name a
SELECT east
FROM students
self joins
'
'
WHERE first George
-
=
'
return that shows with
a
query all persons b
Non -
monotonic Queries SELECT distinct PI.name
(Not) In FROM Persons P ,
Persons PI ,
Persons P2 , Likes L
id L
WHERE PI person A- id AND P2 id =L person
=
returns the names of people who do not
-
-
.
-
take classes
SELECT distinct P.name returns the name at
of all persons that like l
FROM Persons P Takesclasses .
C SELECT distinct PI.name
WHERE P id .
NOT IN ( SELECT C. person - id FROM FROM Persons P, Persons P1 .
Persons P2 ,
Persons P3
Takesclasses C WHERE C. person -
id =P id .
) WHERE PI id =L person A- id
.
.
AND P2 . id =L -
person B
P1 id .
= LI .
person A- id AND P3 . id =
LI .
person B- id AND
L .
personB- id <>
LI .
personB- id
returns the name of all male persons that pla
returns the name of all persons who SELECT distinct PI . name
do not know who takes classes FROM Persons Pd Persons P2 sport Together S
anyone , ,
SELECT distinct P.name WHERE P1 id .
= 5. person A- id AND P2 id .
= S .
personB-id
" " "
P2
"
FROM Persons P ,
Persons P2 S .
sport
= soccer AND .
gender =
female OR P2 -
PI
"
id
"
"
WHERE P id. NOT IN ( SELECT K -
persona -
AND .
gender =
male AND 5.sport =
soccer
"
FROM Takesclasses T ,
knows K WHERE
( Inner) Join
K . PersonB- id =
T .
person -
id)
SELECT A. name .
B. name
FROM TableA A JOIN Tablets B ON A. id = B. id
( Not ) Exists Left Counter) Join
returns the name all persons that SELECT A. name B. name
of ,
aoe at least as old as everybody else FROM Table A A LEFT JOIN Tablets B ON A. id -_ Bid
SELECT P.name
FROM Persons P Right cover ) joins
SELECT A. name B. name
WHERE NOT EXISTS ( SELECT PS.name ,
Bid
age )
< PI FROM TARKA A RIGHT Tablets B ON A. id
FROM Persons PI WHERE JOIN
=
P .
age .
Full Counter) Joins
returns the name like
SELECT A. name B. name
of all persons that ,
FROM Table A A Tablets B ON A. id Bid
everyone they FULL JOIN -_
know
SELECT distinct P.name
Persons P , Likes L For All All ,
FROM ,
knows K
Any , Som
WHERE NOT EXISTS ( SELECT P id.
FROM Persons return the name of all persons which stud
PI Likes L Knows K K person A- id that are more than 5 older homework
WHERE years
-
. .
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