Xây dựng phần mềm bán hàng máy tính



 !"#$%&'()*+,&'
(+!-.)**/
012!3(145 6+3()/7
82!+9')("9()/( "9:
-
;<=>+8?2!4"@A&7B)+,?
C@+D5 (2!4"@((
EF G9?!C5!>7(!H2!?")I
J+8?&KL"'?.M(+G!"
N!(OPQPNRSNJJOPPT.(JN-
;I)+,"U+8V
.+8QWXY$ZR[E$
.+8OW\]^N_X`a$Xbc$ZGd=_.;e$fg[.h[
.+8iWjk$Xl.
.+8UWX`mX\m-
G9+9n'?!oX1J)p(&(()I
!C-X!)pHq5?!>7+8
?+qK:L!*-r1(')+,
4*@R!@s-
rt>48-
XQ

  !
.M"L"'?5 L)u)+,&Dp
v((w"/sD)s!((-$rX-v((w.MC.
.xxyEGE-.M)+,C!4"L*)+,>&KL.xxG!"
FzJ"y#
" #$%&'$()
" *+

v/&{)"+!L/!L"!()*-.|.M!)>
)&(/&V
[ modifier ] datatype identifer ;
G9(wJ"/(L}*V!&"J(JJ#0J
"!L"!~"(w"( •JwJ"C&-
"" ,-
K6"/&+K)%-F" 1
!C"9/)€")%4)4
&4(*)+,)%(!H+8?-
". /0123
.M"'?!L"!/L!L"!"4
&(!•)H+,(~!H!CH!!•!)!
#•?&C|(+"'?&"•(‚/"(
!L"!*)+,(!L"!-\!L"!/)H+,"
/7!)?&C'&7+9/)H+,-
.M',!L"!7V!t>ƒ~&!"„•
L!1(+"'?!)+,+{)€~!J„JwJ•(
XO
+"'?(-.M>',!L"!"(VL"!!
!2!!-
$€"C/+8?.ML"!)+,"+!L/(…8{J(
)…{!L"!-
G>(!"+!!L"!!L"!
!(&/9-;H9/!L"!?)+,"+!L7+9'
(&/9)p1"-X()*?)†!L"!!?
)+,"+!(+)H+,'?"+!(&/9J-
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w"(„(!&JJF(("JJ-
"4 53
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if (biểu thức điều kiện)
<khối lệnh thực hiện khi điều kiện đúng>
else
<khối lệnh thực hiện khi điều kiện sai>
• .>!"Š
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Switch (biểu thức)
{ casce biểu thức ràng buộc:
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Câu lệnh
Cậu lện nhảy
[default: câu lệnh mặc định]
}
"9 :;3<&
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• G0"…w(V
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for ([phần khởi tạo]; [biểu thức điều kiện]; [bước lặp])
<Câu lệnh thực hiện>
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while (Biểu thức)
<Câu lệnh thực hiện>
• G0"…(#Š"J~XJ(#Š"JS((•
do
<Cậu lệnh thực hiện>
while (điều kiện)
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foreach (<kiểu tập hợp><tên truy cập thành phần>in<tên tập hợp>)
<Các câu lệnh thự hiện>
• .>!"((
• .>!"&J
X{>!"!H}(:0"…-
XU
• .>!"(!J
.>!"(!J)+,{(0"…&!HD)/"/0
"…+"!Hs"0"(0"…D/)(
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• .>!"J!
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*&!5-
"= #$>#?
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• .‚("(V•‘’“••‘‘”•
• j‚/!•Vx•
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• .‚(2!V••”•–—–•—••
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&J
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)/)+,&DNRSJJ-
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„z{)!1/&4(8DL"!-
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SELECT <column_list>
FROM <table_list>
WHERE <search_criteria>

jsNrSr.Xt)/!H s˜^bvt)&4*/
)+, s•rbr9)+, -
„.|)s)>!"NrSr.X"V
SELECT {ALL | DISTINCT}{TOP n {PERCENT}{WITH TIES}}
XT
{ INTO new_table }
{ FROM <table_sources> }
{ WHERE <search_condition>}
[ GROUP BY [ALL] group_by_expression [,…n]
[ WITH {CUBE | ROLLUP}]
[HAVING <search_condition> ]
[ORDER BY {column_name [ASC | DESC ]} […n] ]
[COMPUTE (expression)]
v)Zb^[jFf*L"!%…()•rbr)4
L0)8-v)Zb^[jFfESS414*&(I4
L*)5C!!‰D)•rbr-
v)EG`$Z)…C!!‰t)L0()+,4&D
)Zb^[jFf-
.)Zb^[jFfEG`$Zs(4pLC!s!1))
{,9C!!‰E$N`-v/(LC!s!")Zb^[jFf
4514/,(NrSr.X("!ž"-fC!s!"
L/C!!‰()EG`$Z†4/-
v)^bzrbFf{)qtL"!){D/*
!L"!Jt~u&4•(…J~?4•-
v).^vj[Xr4L00%H-
9" 53O^_
„z{)C/(/&4/)-
„.|V
INSERT [INTO]
{<table_or_view>}

{column_list}
VALUES {select_statement | execute_statement}
9. 53QG^
XŸ
„z{))%/(
„.|V
UPDATE
{table_name | view_name}
SET
Column_name1={expression1 | NULL | (select_statement)}
[, column-name2=…]
[WHERE search_conditions]
v)NrX(†)L/) ,''-
94 53G^^^
„.(‚t*/!L"!}/&4-
„.|V
DELETE [ FORM ] { table_name | view_name}
[ WHERE clause ]
96 `aJ $#$(#%
\>C!H5u&sC?>C4
(*)8C>!)*9()8(-
X()8>C4&p-
X()8>Cs4&s!L?H
"+,&(C!I!)*((}sC-$!H"+,s
!:8(…&KH"+,((?t!1(-
\t!1?>C5u(
}!-X()8(*9*+,
(,(…+(I!)*((-
X+,0,?(,(-
"/,bcOd,e_f:gVdh,Wi

 /)>H#%7##j
 k$K&+$[J7 %
XQP
.{9{9t>'
*3(3"€)Htp/?A 7
(2!4"@)pD/!s!1&*"/(L!H
!K>(1"+,!2!4(2!4"@/
-
X("€2!4"@*&()!†&%t!
1*u¡?1!
)/7t‚-
z()*X3(()/(<v!&2!4"@B
DCs-G5 X3(2!4"@|
((+(:"()/>(!2!4
)+,1!-
" l$7k$%\Z$'$[J7 %
 ;u@)u'V)u@s>C+2!4"7
)u')*+89H-
 ;%'‰!V!1"'‰!9(>C+2!4"7-
 R!4"@…V
„XC…VXC…9(.NzS-
„=*…VfC!s!t*L…2!6(…s-
„NA…V.†AL…"•-
 R!4"@ V
„R!4"@…!1''-
 R!4"@V
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„=*VfC!s!t*Ls-
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X*"+8{,(R!4"@&"
7?2!4"@&K+815H)0:4
*""+,"9>C)-z()*(/&/I
()/‚!2!4-\4u)5(-
XQi
=!1}!s!)%9{,9tp/
)%H2!4"@&K/H2!4"@9H+!8"/)!

1!-
= WZ$'7`CjA
G9,|\(.s)…&"L5
 .H2!4"@&"74)5
)+,LC!s!!V
• H!tA"@-
• .)/(q&q*-
• X?)+,*"C2!-
• S+!L)+,(/-
@ m70C$[JjCA
• b|q)+,">C-
• NA 7(?
*‡*!'-G"+!L)84
s4*8"+!L"9*7t
*-
• GHC)o}o}u!'*-
• G95utA"@H9|q>C2!4
"@4H"+,>C2!4"@?+}-
I n$70C$[JjCA
$(L+!)"?H96*L+,)+V
„ \7)t>H91H‚-
„ j4&*#-
" Q5k$%+8+j
XQU
" /)>H#FY
"" /)>H#
.E˜.+!1"(7! )š
(4t!1!1 !-.4‰!>
)+,'}4t!1!1 -.4‰)+,+&
"+!L((!)*!19)H+,!}L

"¢(9L)H"u+t!C-
". Z$oFY%$o$p$[Jj
X(()/(!>)!*((6+
+8?!|H+!>6+C!)
-X()*2!4"@()+,C!Cq!}'
t!1(HC(&((%J()o-N!)>"
!Cq2!4"@V
q&%V\*!s!'/H*9>Cs"'/)8
'Ip)8'C…s'…
+4t!1H"+,'-N!)+,'
…s"+!L…)p'((L"!-;8
'6)+,"+!L)!'((-
VK%V\')+,C!s!!?>CC9
''(8DL"!)"C""u)I
s"'/)8t!1Ip)8t!1C)†C…
&H"+,&!H{)8)+,"+!((L"!-
J>#V.>C(C)8)+,"+!L(8D
L"!I4)8')8t!1-X()8')+,
94t!1()*7()+H"!s()H9
(+H"+,)8H)p(H0,4
t!1-G()8t!1)+,+89+
XQ™
(D•"¢?)+,,0")H
"u+t!C?*,-
j8ZAXJ()o(sHC"H"!
*6+*)8't!1!)*)+L(H +H
"+,I(H+,94t!1H+,2!JC
H"!HC)+,)+??(()*-
NC8+CA.5u?(‚?…
4t!1-

)3r5ZAXC>C(…>)%>C({
,9??!-$(0*"(&%L>C0"
-
)3r5ZAXC(…>)%(
{,9??!-$(0*"(&%Ls
L"-
"4 V#$7s\Z$'
"4 WZ$'$o$p

;u@)u'V)u@s>C+2!4"7
)u')*+89H-

;%'‰!V!1"'‰!9(>C+2!4"7-

R!4"@…V
„XC…VXC…9(.NzS-
„=*…VfC!s!t*L…2!6(…s-
„NA…V.†AL…"•-
 R!4"@ V
„R!4"@…!1''-
 R!4"@V
„XCVXC9(.NzS-
„=*VfC!s!t*Ls-
XQ›
„NAV.†A-
 R!4"@&V
„XC)8VXC)89~'(…&•(.NzS-
„=*)8VfC!s!t*L)8s-
„NA)8V.†A)8-
„X(14)8-

 XHCV
„XHCL…&…I(-
 X?V
„X?L"C2!…4t!1-
 R!4"@>CV
„XC+{V+2!4*C>>C9
„=*+{Vt*)>C)p†-
„NA+{VA+{-
"4" WZ$'&$o$p
 .(‚H9v((wNRSNJJ-
 H()/C)8S-
XQœ
"6 o$p$k$[Jj
"6 O7t$o$p$[Jj
,N"O7t$o$p$[J$FN
"6" B)$o$p$[JjA
.5u7H&(IV
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