Oracle10g中新型层次查询选项简介

create table hierITPUB个人空间W$c2Ms/}Do.D
ITPUB个人空间cfK(HX:m7M2^
(ITPUB个人空间[5Q!NYrKPs

iP8zX
[�ER3~100788parent varchar2(30),
*m-Md,T2SG~2J100788ITPUB个人空间k5A"?4i2y u^7HTc
child varchar2(30)ITPUB个人空间r,`PO0D2Nq;v(o

/~]I
G|Ol100788);
2o	u2k&x$l]y5C~100788
5Q&]�ErV1^100788insert into hier values(null,'Asia');
oW@o_&A
_S100788ITPUB个人空间m3Y:FO6kZi|
insert into hier values(null,'Australia');
)b;lO
g(`�{ JM(x"]100788
|Q-h.G^n100788insert into hier values(null,'Europe');ITPUB个人空间!x5RL$Yx
y

5?8e3J	m+d+hp100788insert into hier values(null,'North America');
E2hFyC�e100788ITPUB个人空间:C?TMt~
insert into hier values('Asia','China');
;uk%i�i{#uR{2M100788
.uv
W
rn)u
K.F(Y100788insert into hier values('Asia','Japan');
ui�h|:J9R.^]u100788
h7~)HA
|$C2XQ@100788insert into hier values('Australia','New South Wales');ITPUB个人空间$IU]%I@;x)Q

I
? w9Ek	HG(s100788insert into hier values('New South Wales','Sydney');ITPUB个人空间7|o+yl)f"v:`O3A+v
ITPUB个人空间^3^(X&L6@[:UcE%X
insert into hier values('California','Redwood Shores');
 M.kk G[100788
vj
pmD100788insert into hier values('Canada','Ontario');ITPUB个人空间*GA9e
J9M8oH%J

1w BLr*p4E4n100788insert into hier values('China','Beijing');ITPUB个人空间a4d-U'X-c6uT
ITPUB个人空间NhX,C"\8T
insert into hier values('England','London');
i/rkl.}(L)R$p
O100788ITPUB个人空间�|p0E;bG(O/gCT
insert into hier values('Europe','United Kingdom');
Ui	|.a@	jl5k)@#c5R100788
v$b
[+R;H4a Du@(Z100788insert into hier values('Japan','Osaka');ITPUB个人空间+a8Ks l
k^_]Gv
ITPUB个人空间N&U Se]/Sl�C
insert into hier values('Japan','Tokyo');ITPUB个人空间
w*FA4?;g$s1r

w%S#?2|	i%uC	C100788insert into hier values('North America','Canada');ITPUB个人空间SxP	y$C8R
ITPUB个人空间)P2|y�NzlRIC)r
insert into hier values('North America','USA');
n#U&{"|l
Vh100788ITPUB个人空间;x5bL*n6R[.ebH!U
]
insert into hier values('Ontario','Ottawa');ITPUB个人空间C/unC;Xw�C;w
ITPUB个人空间!L2q%]i|F+S3E2Fy8^
insert into hier values('Ontario','Toronto');ITPUB个人空间S;_2[.c!?y"Q

W0R?Y:k`
y100788insert into hier values('USA','California');ITPUB个人空间"z%}+k
]'A'pW"Wem
ITPUB个人空间.cuD2jog@R-GW;KC
insert into hier values('United Kingdom','England'); 

column child format a40
!C;suVMP%J100788
i,x-K,L\dC100788select level,lpad(' ',level*3)||child childITPUB个人空间$H/VM3|vJ3O

CM;Q'Y})yh@100788from hier
;^O$ck5C`Q)N;G100788ITPUB个人空间M*U%|ez1H
start with parent is null
,T]"oQ8B100788
8n{|c}u	Z100788connect by prior child = parent;ITPUB个人空间R(r)t(i:R
ITPUB个人空间d?A5X!ToW
C5E
LEVEL CHILD
7i	o7{t&f~m&s[100788ITPUB个人空间7a)P2Yht*E8ljuU
---------- --------------------------
nk0^!eK*Y6He;}W100788
"j&F-y0FzX;M1007881 Asia
,R0VB8S,H"Vu9c100788ITPUB个人空间U
aJl
a:@'Z
2 ChinaITPUB个人空间*v-b%S^*U*o

$N|t	})I1007883 BeijingITPUB个人空间1C`Oy-RXw

3@-e9`3f0zIT1007882 Japan
u/{zeU#e9]ok100788ITPUB个人空间u,r)b'?g
3 Osaka
FF#hG
Ip5fr$J100788
vvkll0je3Kt$w1007883 TokyoITPUB个人空间Ui(@VYo
ITPUB个人空间l`6|Nv}8aq"jK
1 Australia
$E^+n\8p%q100788ITPUB个人空间/n
y0@y?A*F/|l_
2 New South WalesITPUB个人空间|;w)OPe-eO4h;p

5{|h	\&pU
i1007883 Sydney
an;A`%u5XzWky100788ITPUB个人空间.QU	G0As
a
1 Europe
QO7u�M&U/\H/w;P Ng100788
*pBmv
?
WDA,t1007882 United KingdomITPUB个人空间.n2^+]f9@+z
ITPUB个人空间:p"~$V
vY�P
3 England
^"|,sANk]100788
q i+lG[1007884 LondonITPUB个人空间6UXL'r'Z$IB
ITPUB个人空间q!k"h
OHPA
1 North AmericaITPUB个人空间#m�N5[C�GsQ#t{]4z

g8kKd@E5}Y1007882 CanadaITPUB个人空间!H9L+^;OU,uw
ITPUB个人空间7a%R3SY?u
3 Ontario
!r2nt$rA100788
S O/T
r:i,NI6J1007884 Ottawa
s:ex:RAR6G100788

v�`fr?*j.b,_!x1007884 TorontoITPUB个人空间1\9p!L!M0M_
a6K
ITPUB个人空间F'l
~'fo_ _
2 USA
[g"EKWgKS100788
*mBG
C^
sB+F[1007883 CaliforniaITPUB个人空间id*A@gR9J

?*gqF'y$D'x3z7G)C1007884 Redwood Shores

column path format a50
x8H^B3t^&H100788ITPUB个人空间n#\*RLz
select level,sys_connect_by_path(child,'/') pathITPUB个人空间$s9X3ls"ymY(Z5o:^


Dw#fbB7C^"LU100788from hierITPUB个人空间
d,BZ8d9O

5lb_uUy9XJ100788start with parent is null

n6lA9M*c-WS100788
-_d5qQ4LlU100788connect by prior child = parent;ITPUB个人空间yE|/F/[u7}-e�xID
ITPUB个人空间7tO0n7o+n_Kc*s
LEVEL PATH 
#D~Vu.K
Lx
a100788
7v5X%tc/f@100788-------- --------------------------------------------
W:hT"v(m-g}100788ITPUB个人空间Rg;N7g%B&C]
1 /AsiaITPUB个人空间D:c7brur
ITPUB个人空间0p2H+n$Y+B(B&OE
2 /Asia/ChinaITPUB个人空间R%N}Nn"nB

t]1l$`7l7^;Ox e1007883 /Asia/China/Beijing
#A?Z}z3?8GI100788ITPUB个人空间!v,cyny
2 /Asia/JapanITPUB个人空间+j2zb'Ih#o
DB

xmv%b\DB1007883 /Asia/Japan/Osaka
E'Y{B)o:uH~y;v.j100788ITPUB个人空间i0Q8rL&?Q/^6gA
3 /Asia/Japan/Tokyo
%Cs
Q
k
A*F5U~6`100788
G4V']
u$}Z.Y |qS1007881 /Australia
},EEW,A9l100788ITPUB个人空间g'hh.f�~L(Ev
2 /Australia/New South WalesITPUB个人空间/h)[?	k#G4\6o
ITPUB个人空间Af.y9Q&T;tX:J�P
b
3 /Australia/New South Wales/SydneyITPUB个人空间K9j;k	O(C9d%O3[uX
ITPUB个人空间6^g
_$u(jj
1 /Europe
0X3V`|.q#g6k:e100788
6?[,wJw,p9I,~pMu;j1007882 /Europe/United KingdomITPUB个人空间GXe4R)o2N(m[s4~*S

;H+U1P/~I/`8}kH7n*o1007883 /Europe/United Kingdom/EnglandITPUB个人空间/Ni�Ep2^ u)AkpG"v-q

X8M	i-iy#Gh1007884 /Europe/United Kingdom/England/LondonITPUB个人空间#}7RLG@)b
v&k

*\G
rB9p4E1007881 /North America
0]UqR
j-rWN/SB2_100788ITPUB个人空间(YIK:H
nfq
2 /North America/Canada
-U9rn2E#f1o[!Hfiv100788ITPUB个人空间*e"E,J%d)L;bI
3 /North America/Canada/OntarioITPUB个人空间
[\Z7H�O3p
ITPUB个人空间5D%j/psk#i
4 /North America/Canada/Ontario/Ottawa
+|!x*r~K;xj100788
Ch
N$t9m1007884 /North America/Canada/Ontario/TorontoITPUB个人空间#{%ka7c @?,f�tS6{5K~r
ITPUB个人空间T-d"Q4F}3S	KCb
2 /North America/USAITPUB个人空间.G6q?T$`
p
ITPUB个人空间hDm5H/R3x
3 /North America/USA/CaliforniaITPUB个人空间oiK(}-xL2iOh%XV
ITPUB个人空间AC.i9N2i)uOH;fW
4 /North America/USA/California/Redwood Shores 

select connect_by_isleaf,sys_connect_by_path(child,'/') path
w7x}VbV1Oh4|(Mu100788
1zZ
P(?E+\\|x{6Xk100788from hierITPUB个人空间ny"R�w	L1YQ
ITPUB个人空间,kjQi&Kk1Gp&{F
start with parent is nullITPUB个人空间'e7Gq?G!uD
glY2D

aC'F#y
n�o
v4[100788connect by prior child = parent;
v(e	a%zl,E100788ITPUB个人空间7O%r/b
B$l@[
CONNECT_BY_ISLEAF PATHITPUB个人空间/R�`;EWN

f7b$r
s5g&i100788---------------------------------- 

0 /Asia
zg!]w0c]100788ITPUB个人空间k-dna&Xc*n
0 /Asia/China
0t�SS$E)@.|&e
V-W100788ITPUB个人空间^(ki7uO
ufQp7X
1 /Asia/China/BeijingITPUB个人空间5z|ti+i0}no
ITPUB个人空间;r*mAMT0dJ
0 /Asia/Japan
xv|el/z1wB7u100788ITPUB个人空间Mcr%T~K~^9j
1 /Asia/Japan/OsakaITPUB个人空间&X2y)k(U R%S

&F,\1R$@f:d
~2D4n"T1007881 /Asia/Japan/TokyoITPUB个人空间j.Ty(W3w"]/R	l
ITPUB个人空间1QQ.|
H!K
u!d\)wD
0 /AustraliaITPUB个人空间D3EW%N~U'q3f
ITPUB个人空间
~sWqF
y1B6l:j
0 /Australia/New South Wales
{m?.y}R-n!t100788
K
X7hKP#Z1007881 /Australia/New South Wales/SydneyITPUB个人空间e
u'j4y
Z(MFi;A
ITPUB个人空间'M5u,N;E@Hy
0 /EuropeITPUB个人空间g(i\QY)Qq

V0n MtD wX1007880 /Europe/United KingdomITPUB个人空间suMh2Fr
U
F
ITPUB个人空间6s`0A
@C*v
0 /Europe/United Kingdom/EnglandITPUB个人空间k b4j*F^)G8rx
ITPUB个人空间+M&R!L!khj-r9hOi7R
1 /Europe/United Kingdom/England/London
}3}DQ7xNvJ100788ITPUB个人空间8h)e(S&iK
0 /North AmericaITPUB个人空间'A	{\)?zMU
ITPUB个人空间jvL;q*~IU#}
0 /North America/Canada
p Al1P/[KK0qz
V100788
LhF3I@3{)q1007880 /North America/Canada/Ontario
5E
I6XM_e|!~100788

gf$T�L3z2r!D1007881 /North America/Canada/Ontario/Ottawa
&h1]UG:?
]100788
'N)^l;t.A5T8I*J+eOX-Q+D1007881 /North America/Canada/Ontario/Toronto
^V
^b'qM100788ITPUB个人空间3Ll:k+V;KO's[
0 /North America/USAITPUB个人空间p-LH({%|_Y�o2i-?
ITPUB个人空间/G,@&EZl	_
0 /North America/USA/California
/|cH]_p.u100788ITPUB个人空间(V)m	Z1d5A%xR
1 /North America/USA/California/Redwood Shores