oracle 常用SQL语法手册
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- 文件版本: V1.0
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- 运行平台: Win9X/Win2000/WinXP
Select
用途:
[ zx z Q u_^%k0从指定表中取出指定的列的数据51Testing软件测试网%d L)L8F8O i
语法:51Testing软件测试网S2q6M[e6Z'}P"V
SELECT column_name(s) FROM table_name |
解释:
y8C}.v1rZ-e0从数据库中选取资料列,并允许从一或多个资料表中,选取一或多个资料列或资料行。SELECT陈述式的完整语法相当复杂,但主要子句可摘要为:51Testing软件测试网knl.P4T|)J8w?8a
SELECT select_list
P5^}:K0_OJC0[ INTO new_table ]51Testing软件测试网A"Epf8m ] H!m
FROM table_source51Testing软件测试网/iHQ)v M/\
[ WHERE search_condition ]
.p y)n&{q0[ GROUP BY group_by_expression ]51Testing软件测试网1fEXa?
uDx&tw
[ HAVING search_condition ]51Testing软件测试网Es3i.K'} Q)I!DSgM7A"z
[ ORDER BY order_expression [ ASC | DESC ] ]
例:
"]^7~Pk'D _b9h#B0“Persons”表中的数据有51Testing软件测试网*[*u4K$LV-afZ}``
51Testing软件测试网T*l,_ PX"`o1eT LastName Lj/[L*o`9Q&]P0 | 51Testing软件测试网x,\ Kw yTt~,M FirstName L8W N w\8v-k;d0 | 51Testing软件测试网:RvCf?&i Address51Testing软件测试网/E{0J\$Vw | *rL7V9Eu1K0City51Testing软件测试网f#a6Z1G-S#rM |
51Testing软件测试网2vy uc&y"\w Hansen ?Y0d0K!V*Ys0 | y{k)K{J9X{:S0Ola IKCca:F?!Ts0 | 4p5~/_ WY0Timoteivn 1051Testing软件测试网DgyQo+a | 4YW6q#k@~0Sandnes UXQ%~t)`*]9}0 |
51Testing软件测试网-Jk:IU*^:o2s9i Svendson51Testing软件测试网|v[W6{/g.Y | 51Testing软件测试网`&](OxL6x*DX Tove51Testing软件测试网H!GrN&{V2w0OP | 51Testing软件测试网i6opX5` Borgvn 2351Testing软件测试网p5r'H;Rz | 51Testing软件测试网@$lX Dz-s!I&x)Z/m
` Sandnes51Testing软件测试网-AUF;`9?Jr&[ |
hqSd,g4R8X6a0Pettersen51Testing软件测试网rg#Ssu ~d6A;k | Mu/CJp#W2d5T,p0Kari51Testing软件测试网3J2E l2Zg | \U4F!JG^3A0Storgt 2051Testing软件测试网'n3ct B*Gk3U] d | 51Testing软件测试网.R;z.kq4o5b}R Stavanger51Testing软件测试网9m[oi:x |
选出字段名”LastName”、”FirstName”的数据51Testing软件测试网"uF8?LK,IA4I
SELECT LastName,FirstName FROM Persons |
返回结果:51Testing软件测试网[ Y(m;^D+C
51Testing软件测试网Ku`#t` ` yS7J;z(| LastName 2m |&e4F.l5j$s6Na7h0 | 51Testing软件测试网:}qn&RN'wD FirstName51Testing软件测试网&NINT"C-f7GN(y |
51Testing软件测试网y3b+b\[ etC Hansen B&d$e!Ha,AZ4|'xh0 | |)E A"c wvq!DQ0Ola51Testing软件测试网+h~5j;Qy,bF9~ |
51Testing软件测试网MCSP(c|L Svendson 8Uv%o;D4D{L0 | 51Testing软件测试网 Y;w5h{\#dZ#jx Tove 9uFA \;CW6w|1T0 |
$D[M_ S"W0Pettersen hU u-P]gC0 | 51Testing软件测试网'Fv1|
xp;M#|3p-}{M-w/g Kari51Testing软件测试网(s8UXXj:T |
选出所有字段的数据51Testing软件测试网1l!\^-D ?4|&A
SELECT * FROM Persons |
返回结果:
qv{7])G r4{[;HU05F4To{b1U0LastName51Testing软件测试网h7Q1a)qjJP | }cgc!fe#C T0FirstName 8w@5]2|K` hv0 | L#q4t"DIV*TecD0Address51Testing软件测试网D}~ a4?]/X![IU6} V | 51Testing软件测试网5?5x!?d|lT4V[#` City51Testing软件测试网tG9w f7P't)H3UA |
9Fc n|Z0D0Hansen51Testing软件测试网\2?3b7E){t"s-apa | 51Testing软件测试网9orw~9M(R~x Ola51Testing软件测试网#H{@-Yf6E9HZ | &jw}^ p0Timoteivn 1051Testing软件测试网%HJRS!z"T!i$i | ]t6e!n6jGyW0Sandnes $my%?:wH#@7^r2O$r2i0 |
N4~3i g$hL0Svendson ;C$K)JD V![V0^-y0 | 51Testing软件测试网
U2YH{qIEH Tove 5{j!q;`N@tf0 | Kq5{pr4LE(h[0Borgvn 2351Testing软件测试网0DZS8{M2@1p)I | 51Testing软件测试网mc\H
h"i5Q Sandnes g}5}Qy8z0 |