Study with the several resources on Docsity
Earn points by helping other students or get them with a premium plan
Prepare for your exams
Study with the several resources on Docsity
Earn points to download
Earn points by helping other students or get them with a premium plan
Community
Ask the community for help and clear up your study doubts
Discover the best universities in your country according to Docsity users
Free resources
Download our free guides on studying techniques, anxiety management strategies, and thesis advice from Docsity tutors
This is helpful for your study purpose and you will learn good things.
Typology: Study notes
1 / 11
This page cannot be seen from the preview
Don't miss anything!
Ihip y8s
-uttvaluce
atähctey
in -he view^ o^ b-^ togica^ schent
in DEMS,^ u^ knp
as CR Aiagg am.
CR (^) Moclet,
Dacs a €e
ib
Name
aiagu am^ for^ a^ étudent
Ctcdent
Td card
Card
Boan ch
-CR mode) (^) Con cists c (^) hoee (^) cornponor
(D attbib^
ules
D- 24/^ o3|^24
eR (^) Modcl|
Weak
-Atibute,^
letationshp.
DeiveA
one-tu many
attoibut
attoi bute^
butet
be
Physical eríst^
an te,
an objech^
uitth
ba an^ Obect^ uitth^ a
-An enthy^ tyre^ hat
Ret
pach ortiny
gome ontih^ yre^ eiM^ or^ uhih
Ky at^ titutes^ Cannot^
be (^) deftreA, (^) hc
enty yeas,
ut the^ detendent^ Aont^
have
dafen dA^ ent^
entity tyee,^
ot be
t4enthy entity^
ype too^ det^ end
ent uckicy
hetwecn Weak
an d^ tbeng enity^ yre
delati onship^
diamohe)
Hempleye
eihbhedc(en^ den
t
d. Ataibutes.^ prapperHes h
at
-they entéty
yPe
.
deb lnes^
-he
age ,addoest
,ozl
no.
atbilh^ t es^
ype "Stuqont"
ne
the
the (^) Rmbol .oval^ (aih
os D-24|03]
Types o^ attoibutes.
huntque tdentífleation^ oo^ each^ tudant
entty -yee.
with
tun der^ üne^ RON^ Do.
many
The
attbibute
ot
Compoeite
afbibut
for eq-^ 4ge at bibte^ (^
deiveq fom^
Tn ce^ diago^
am
dashe d^
Doaw a
entity type^ wsing
foo student
ertities and^ 14ees
|9udent Infomaf
Add)
Phone nt
Gecle
CLsomer uho
ci) (State)
name)i
fA
Relatonehip palo4le
Retalien (hip (^) oepoes ents (^) e
as. (^) beucen
between enkty yre taudent and
Tn eR^ Ataq^ am^ he^ eaion
a (^) tiamond (^) and (^) cooneeti
the
LLith
Cntity getation^
Skip set
A Set^ ob^
oelation^
Knoeon
octation ship^
Set,
or eg.^ the^
qiaq ram^ oefoesert^
Seta S,^ iu^
enooiled tn
Ci &
Dalation Ship^
set
The n0. ob^ dibb^ erent^
faotcipating
hn there arc
fasticirattng in^ a^
t is
Called
etationthip.
Car din^ alihy^ The^
no. of^ timss^
nity ket^
aotcipastng^
th a^ gataton
Ship ce^
& Kncwn (^) cartinatiy
retation thip^ cat
tuhen cach^ s^
in ea ch
t can taC^ part
olatins hi^ p^ hen^ -he-^ cat^ din atithy
u na
Aer Cre^
sViCe
verSa,
the cardtnalty
t (^) Che and the
hip
tation
Male
1 female
(one-to. Che^
catdinati^ y)
M M My (^) oelationhip
nelatOn Ship.
numbe
then -the^ candin^ atity
tha rel alion^
ship
kneh
octation8hip. Cheedert
asoáata
many
Stedent
errclein
Onetu
ceurse
candinalihy
uhen multíple^ entíes^
are asoiate¢
set then^ the
cardinatithy^ u^ many^
on
One tetationship.
Ctudent
Stucerrts (^) Can emoil^ tU^
one Gubjek
ceese
Onc
(art
(manyt
nali
Cmond
-to- one^
ralationship).
