PHỤ THUỘC HÀM VÀ CÁC DẠNG CHUẪN - Pdf 12

Chương 8
PHỤ THUỘC HÀM VÀ CÁC DẠNG CHUẨN
 


 !"#$

%!& 

'()
 *


+'$

,-./

010234 5678"9:

; 

<1

=>=

,'7?@AA7'B!
 C


D0D /
E

 X
#$%&'(%

D0D$"YZ[PP8=> !=>'lược đồ
quan hệ tốt.

\D0D]#^1V_P87MN>/J
Lending-schema là một sự thiết kế tốt hay tồi ?
Lending-schema
 `
#$%&'(%

(A5a5 & !-D0D#H

a-7MN>:B7 5bB7Vb5

F0/

=>=>c(>

A& D&",V,"d"#A5& ! !"#F:

e7f"#
 g
")*

a->e7f&$F& !8&$ZJ%"I->e7f
&V&& L -7MN>/J

"SI$7hU>LV7W7F$'7W>e7f:

Tênphim Nămsx Thilư!ng Lo#iphim Xư%ngsx Di'nviên
     
     
     
      !!"
#  $  % "
#  $  % 
&'()*)
+(,
*
-./0
12*0*300.4(45*67*89:;.<
 k*
./0'/1

1,1'!I0/'>%'B!$J\WD:

9'7?"79B!J

F90/7J

/NN70D$L  F0n%[7& a b

K'7?@AA1,GLV7'7o>:

!I0/"'>%J

K'7?(!IG'"?J

K'7?G'"?b=>J

 k *
 k 
PTH Yes/No
A→A
V5
A→B
V5
A→C

A→AB
V5
A→AC

A→BC

A→ABC

AB → C


JJJ

W  d F  1 , & B
;H
 k`
+256

\=-8&u+!I8& F$[7$
J


W "9
*>?→-@:;
*>?→A7
*>?→+:B
*>?→C".
E,F*GHF
k
:;

<O,;
E
7k
* >? -@:; A7* +:B C".
     
     
     
      !!"
#  $  % "
#  $  % 
*→A7

:;47

<O,;
E
7
* >? -@:; A7* +:B C".
     
     
     


-[+4→X4Z
=ID
>Y+→X"FX→Z
-[+→Z
C
<)=>%/

Ae
E
BNUL

Ae
E
/
E


Ae
E
>e7f
=D
=$D
=\D
>Y+→X"FX4→Z
-[+4→Z
>Y+→X"F+→Z
-[+→X4Z
>Y+→X"FZ


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