2016.9.26小程序---数据库小练习1
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1 -- createbbc, 1, 50 2 DROP TABLE bbc; 3 4 CREATE INDEX bbc_region ON bbc(region); 5 6 7 -- tabbbc, 1, 50 8 INSERT INTO bbc VALUES (‘Afghanistan‘,‘South Asia‘,652225,26000000,NULL); 9 INSERT INTO bbc VALUES (‘Albania‘,‘Europe‘,28728,3200000,6656000000); 10 INSERT INTO bbc VALUES (‘Algeria‘,‘Middle East‘,2400000,32900000,75012000000); 11 INSERT INTO bbc VALUES (‘Andorra‘,‘Europe‘,468,64000,NULL); 12 INSERT INTO bbc VALUES (‘Angola‘,‘Africa‘,1250000,14500000,14935000000); 13 INSERT INTO bbc VALUES (‘Antigua and Barbuda‘,‘Americas‘,442,77000,770000000); 14 INSERT INTO bbc VALUES (‘Argentina‘,‘South America‘,2800000,39300000,146196000000); 15 INSERT INTO bbc VALUES (‘Armenia‘,‘Europe‘,29743,3000000,3360000000); 16 INSERT INTO bbc VALUES (‘Australia‘,‘Asia-Pacific‘,7700000,20300000,546070000000); 17 INSERT INTO bbc VALUES (‘Austria‘,‘Europe‘,83871,8100,261630000000); 18 INSERT INTO bbc VALUES (‘Azerbaijan‘,‘Europe‘,86600,8500000,NULL); 19 INSERT INTO bbc VALUES (‘Bahamas‘,‘Americas‘,13939,321000,4789320000); 20 INSERT INTO bbc VALUES (‘Bahrain‘,‘Middle East‘,717,754000,9357140000); 21 INSERT INTO bbc VALUES (‘Bangladesh‘,‘South Asia‘,143998,152600000,67144000000); 22 INSERT INTO bbc VALUES (‘Barbados‘,‘Americas‘,430,272000,2518720000); 23 INSERT INTO bbc VALUES (‘Belarus‘,‘Europe‘,207595,9800000,20776000000); 24 INSERT INTO bbc VALUES (‘Belgium‘,‘Europe‘,30528,10300000,319609000000); 25 INSERT INTO bbc VALUES (‘Belize‘,‘Americas‘,22965,266000,NULL); 26 INSERT INTO bbc VALUES (‘Benin‘,‘Africa‘,112622,7100000,3763000000); 27 INSERT INTO bbc VALUES (‘Bhutan‘,‘South Asia‘,38364,2400000,1824000000); 28 INSERT INTO bbc VALUES (‘Bolivia‘,‘South America‘,1100000,9100000,NULL); 29 INSERT INTO bbc VALUES (‘Bosnia-Hercegovina‘,‘Europe‘,51129,4200000,8568000000); 30 INSERT INTO bbc VALUES (‘Botswana‘,‘Africa‘,581730,1800000,7812000000); 31 INSERT INTO bbc VALUES (‘Brazil‘,‘South America‘,8550,182800000,564852000000); 32 INSERT INTO bbc VALUES (‘Brunei‘,‘Asia-Pacific‘,5765,374000,NULL); 33 INSERT INTO bbc VALUES (‘Bulgaria‘,‘Europe‘,110994,7800000,21372000000); 34 INSERT INTO bbc VALUES (‘Burkina Faso‘,‘Africa‘,274200,13800000,4968000000); 35 INSERT INTO bbc VALUES (‘Burma‘,‘Asia-Pacific‘,676552,50700000,NULL); 36 INSERT INTO bbc VALUES (‘Burundi‘,‘Africa‘,27816,7300000,NULL); 37 INSERT INTO bbc VALUES (‘Cambodia‘,‘Asia-Pacific‘,181035,14800000,4736000000); 38 INSERT INTO bbc VALUES (‘Cameroon‘,‘Africa‘,465458,16600000,13280000000); 39 INSERT INTO bbc VALUES (‘Canada‘,‘North America‘,9900000,32000000,908480000000); 40 INSERT INTO bbc VALUES (‘Cape Verde‘,‘Africa‘,4033,482000,853140000); 41 INSERT INTO bbc VALUES (‘Central African Republic‘,‘Africa‘,622984,3900000,NULL); 42 INSERT INTO bbc VALUES (‘Chad‘,‘Africa‘,1280000,9100000,2366000000); 43 INSERT INTO bbc VALUES (‘Chile‘,‘South America‘,756096,16200000,79542000000); 44 INSERT INTO bbc VALUES (‘China‘,‘Asia-Pacific‘,9600000,1300000000,1677000000000); 45 INSERT INTO bbc VALUES (‘Colombia‘,‘South America‘,1140000,45600000,NULL); 46 INSERT INTO bbc VALUES (‘Comoros‘,‘Africa‘,1862,812000,NULL); 47 INSERT INTO bbc VALUES (‘Costa Rica‘,‘Americas‘,51100,4300000,NULL); 48 INSERT INTO bbc VALUES (‘Croatia‘,‘Europe‘,56594,4400000,28996000000); 49 INSERT INTO bbc VALUES (‘Cuba‘,‘Americas‘,110860,11300000,NULL); 50 INSERT INTO bbc VALUES (‘Cyprus‘,‘Europe‘,9250,807000,14187060000); 51 INSERT INTO bbc VALUES (‘Czech Republic‘,‘Europe‘,78866,10200000,93330000000); 52 INSERT INTO bbc VALUES (‘Democratic Republic of Congo‘,‘Africa‘,2340000,56000000,6720000000); 53 INSERT INTO bbc VALUES (‘Denmark‘,‘Europe‘,43098,5400000,219510000000); 54 INSERT INTO bbc VALUES (‘Djibouti‘,‘Africa‘,23200,721000,NULL); 55 INSERT INTO bbc VALUES (‘Dominica‘,‘Americas‘,751,71000,259150000); 56 INSERT INTO bbc VALUES (‘Dominican Republic‘,‘Americas‘,48072,9000000,NULL); 57 INSERT INTO bbc VALUES (‘East Timor‘,‘Asia-Pacific‘,14609,857000,NULL); 58 -- tabbbc, 51, 50 59 INSERT INTO bbc VALUES (‘Ecuador‘,‘South America‘,272045,13400000,NULL); 60 INSERT INTO bbc VALUES (‘Egypt‘,‘Middle East‘,1000000,74900000,98119000000); 61 INSERT INTO bbc VALUES (‘El Salvador‘,‘Americas‘,21041,6700000,15745000000); 62 INSERT INTO bbc VALUES (‘Equatorial Guinea‘,‘Africa‘,28051,521000,484530000); 63 INSERT INTO bbc VALUES (‘Eritrea‘,‘Africa‘,117400,4561599,NULL); 64 INSERT INTO bbc VALUES (‘Estonia‘,‘Europe‘,45227,1300000,9113000000); 65 INSERT INTO bbc VALUES (‘Ethiopia‘,‘Africa‘,1130000,74200000,8162000000); 66 INSERT INTO bbc VALUES (‘Fiji‘,‘Asia-Pacific‘,18376,854000,NULL); 67 INSERT INTO bbc VALUES (‘Finland‘,‘Europe‘,338145,5200000,170508000000); 68 INSERT INTO bbc VALUES (‘Former Yugoslav Republic of Macedonia‘,‘Europe‘,25713,2000000,4700000000); 69 INSERT INTO bbc VALUES (‘France‘,‘Europe‘,543965,60700000,1826463000000); 70 INSERT INTO bbc VALUES (‘Gabon‘,‘Africa‘,267667,1400000,NULL); 71 INSERT INTO bbc VALUES (‘Georgia‘,‘Europe‘,69700,5000000,5200000000); 72 INSERT INTO bbc VALUES (‘Germany‘,‘Europe‘,357027,82500000,2484900000000); 73 INSERT INTO bbc VALUES (‘Ghana‘,‘Africa‘,238531800000,82500000,8284000000); 74 INSERT INTO bbc VALUES (‘Greece‘,‘Europe‘,131957,11000000,182710000000); 75 INSERT INTO bbc VALUES (‘Grenada‘,‘Americas‘,344,103000,NULL); 76 INSERT INTO bbc VALUES (‘Guatemala‘,‘Americas‘,108890,13000000,NULL); 77 INSERT INTO bbc VALUES (‘Guinea‘,‘Africa‘,245857,8800000,4048000000); 78 INSERT INTO bbc VALUES (‘Guinea-Bissau‘,‘Africa‘,36125,1600000,256000000); 79 INSERT INTO bbc VALUES (‘Guyana‘,‘South America‘,214969,768000,NULL); 80 INSERT INTO bbc VALUES (‘Haiti‘,‘Americas‘,27750,8500000,NULL); 81 INSERT INTO bbc VALUES (‘Honduras‘,‘Americas‘,112492,7200000,7416000000); 82 INSERT INTO bbc VALUES (‘Hungary‘,‘Europe‘,93030,9800000,81046000000); 83 INSERT INTO bbc VALUES (‘Iceland‘,‘Europe‘,103000,294000,11354280000); 84 INSERT INTO bbc VALUES (‘India‘,‘South Asia‘,3100000,1100000000,682000000000); 85 INSERT INTO bbc VALUES (‘Indonesia‘,‘Asia-Pacific‘,1900000,225300000,256842000000); 86 INSERT INTO bbc VALUES (‘Iran‘,‘Middle East‘,1650000,70700000,162610000000); 87 INSERT INTO bbc VALUES (‘Iraq‘,‘Middle East‘,317,26500000,NULL); 88 INSERT INTO bbc VALUES (‘Ireland‘,‘Europe‘,70182,4000000,137120000000); 89 INSERT INTO bbc VALUES (‘Israel and Palestinian territories‘,‘Middle East‘,20770,3800000,4256000000); 90 INSERT INTO bbc VALUES (‘Italy‘,‘Europe‘,301338,57200000,1494064000000); 91 INSERT INTO bbc VALUES (‘Ivory Coast‘,‘Africa‘,322462,17100000,13167000000); 92 INSERT INTO bbc VALUES (‘Jamaica‘,‘Americas‘,10991,2700000,7830000000); 93 INSERT INTO bbc VALUES (‘Japan‘,‘Asia-Pacific‘,377864,127900000,4755322000000); 94 INSERT INTO bbc VALUES (‘Jordan‘,‘Middle East‘,89342,5700000,12198000000); 95 INSERT INTO bbc VALUES (‘Kazakhstan‘,‘Asia-Pacific‘,2700000,15400000,NULL); 96 INSERT INTO bbc VALUES (‘Kenya‘,‘Africa‘,582646,32800000,15088000000); 97 INSERT INTO bbc VALUES (‘Kiribati‘,‘Asia-Pacific‘,810,85000,82450000); 98 INSERT INTO bbc VALUES (‘Kuwait‘,‘Middle East‘,17818,2700000,48519000000); 99 INSERT INTO bbc VALUES (‘Kyrgyzstan‘,‘Asia-Pacific‘,199900,5300000,NULL); 100 INSERT INTO bbc VALUES (‘Laos‘,‘Asia-Pacific‘,236800,5900000,230100000); 101 INSERT INTO bbc VALUES (‘Latvia‘,‘Europe‘,64589,2300000,NULL); 102 INSERT INTO bbc VALUES (‘Lebanon‘,‘Middle East‘,10452,3800000,18924000000); 103 INSERT INTO bbc VALUES (‘Lesotho‘,‘Africa‘,30355,1800000,1332000000); 104 INSERT INTO bbc VALUES (‘Liberia‘,‘Africa‘,99067,3600000,396000000); 105 INSERT INTO bbc VALUES (‘Libya‘,‘Africa‘,1770000,5800000,25810000000); 106 INSERT INTO bbc VALUES (‘Liechtenstein‘,‘Europe‘,160,34000,NULL); 107 INSERT INTO bbc VALUES (‘Lithuania‘,‘Europe‘,65300,3400000,19516000000); 108 INSERT INTO bbc VALUES (‘Luxembourg‘,‘Europe‘,2586,465000,26146950000); 109 -- tabbbc, 101, 50 110 INSERT INTO bbc VALUES (‘Madagascar‘,‘Africa‘,587041,18400000,5520000000); 111 INSERT INTO bbc VALUES (‘Malawi‘,‘Africa‘,118484,12600000,2142000000); 112 INSERT INTO bbc VALUES (‘Malaysia‘,‘Asia-Pacific‘,329847,25300000,NULL); 113 INSERT INTO bbc VALUES (‘Mali‘,‘Africa‘,1250000,13800000,4968000000); 114 INSERT INTO bbc VALUES (‘Malta‘,‘Europe‘,316,397000,4863250000); 115 INSERT INTO bbc VALUES (‘Marshall Islands‘,‘Asia-Pacific‘,181,57000,135000); 116 INSERT INTO bbc VALUES (‘Mauritania‘,‘Middle East‘,1040000,3100000,1302000000); 117 INSERT INTO bbc VALUES (‘Mauritius‘,‘Africa‘,2040,1200000,5568000000); 118 INSERT INTO bbc VALUES (‘Mexico‘,‘North America‘,1960000,106400000,720328000000); 119 INSERT INTO bbc VALUES (‘Micronesia‘,‘Asia-Pacific‘,700,111000,NULL); 120 INSERT INTO bbc VALUES (‘Moldova‘,‘Europe‘,33800,4300000,3053000000); 121 INSERT INTO bbc VALUES (‘Monaco‘,‘Europe‘,2,32000,NULL); 122 INSERT INTO bbc VALUES (‘Mongolia‘,‘Asia-Pacific‘,1560000,2700000,NULL); 123 INSERT INTO bbc VALUES (‘Morocco‘,‘Middle East‘,710850,31600000,48032000000); 124 INSERT INTO bbc VALUES (‘Mozambique‘,‘Africa‘,812379,19500000,4875000000); 125 INSERT INTO bbc VALUES (‘Namibia‘,‘Africa‘,824292,2000000,4740000000); 126 INSERT INTO bbc VALUES (‘Nauru‘,‘Asia-Pacific‘,21,9900,NULL); 127 INSERT INTO bbc VALUES (‘Nepal‘,‘South Asia‘,147181,26300000,6838000000); 128 INSERT INTO bbc VALUES (‘New Zealand‘,‘Asia-Pacific‘,270534,4000000,81240000000); 129 INSERT INTO bbc VALUES (‘Nicaragua‘,‘Americas‘,120254,5700,4503000000); 130 INSERT INTO bbc VALUES (‘Niger‘,‘Africa‘,1270000,12900000,2967000000); 131 INSERT INTO bbc VALUES (‘Nigeria‘,‘Africa‘,923768,130200000,50778000000); 132 INSERT INTO bbc VALUES (‘North Korea‘,‘Asia-Pacific‘,122762,22900000,NULL); 133 INSERT INTO bbc VALUES (‘Norway‘,‘Europe‘,323759,4600000,239338000000); 134 INSERT INTO bbc VALUES (‘Oman‘,‘Middle East‘,309500,3000000,23670000000); 135 INSERT INTO bbc VALUES (‘Pakistan‘,‘South Asia‘,796095,161100000,96660000000); 136 INSERT INTO bbc VALUES (‘Palau‘,‘Asia-Pacific‘,508,20000,NULL); 137 INSERT INTO bbc VALUES (‘Panama‘,‘Americas‘,75517,3200000,NULL); 138 INSERT INTO bbc VALUES (‘Papua New Guinea‘,‘Asia-Pacific‘,462840,5900000,3422000000); 139 INSERT INTO bbc VALUES (‘Paraguay‘,‘South America‘,406752,6200000,NULL); 140 INSERT INTO bbc VALUES (‘Peru‘,‘South America‘,1280000,28000000,NULL); 141 INSERT INTO bbc VALUES (‘Poland‘,‘Europe‘,312685,38500000,234465000000); 142 INSERT INTO bbc VALUES (‘Portugal‘,‘Europe‘,92345,10500000,150675000000); 143 INSERT INTO bbc VALUES (‘Qatar‘,‘Middle t‘,11437,628000,NULL); 144 INSERT INTO bbc VALUES (‘Republic of Congo‘,‘Africa‘,342000,3039126,NULL); 145 INSERT INTO bbc VALUES (‘Romania‘,‘Europe‘,238391,22200000,64824000000); 146 INSERT INTO bbc VALUES (‘Russia‘,‘Europe‘,17000000,141500000,482515000000); 147 INSERT INTO bbc VALUES (‘Rwanda‘,‘Africa‘,26338,8600000,1892000000); 148 INSERT INTO bbc VALUES (‘Samoa‘,‘Asia-Pacific‘,2831,182000,NULL); 149 INSERT INTO bbc VALUES (‘San Marino‘,‘Europe‘,61,27000,NULL); 150 INSERT INTO bbc VALUES (‘Sao Tome and Principe‘,‘Africa‘,1001,169000,62530000); 151 INSERT INTO bbc VALUES (‘Saudi Arabia‘,‘Middle East‘,2240000,25600000,267008000000); 152 INSERT INTO bbc VALUES (‘Senegal‘,‘Africa‘,196722,10600000,7102000000); 153 INSERT INTO bbc VALUES (‘Serbia and Montenegro‘,‘Europe‘,102173,10500000,27510000000); 154 INSERT INTO bbc VALUES (‘Seychelles‘,‘Africa‘,455,76000,NULL); 155 INSERT INTO bbc VALUES (‘Sierra Leone‘,‘Africa‘,71740,5300000,1060000000); 156 INSERT INTO bbc VALUES (‘Singapore‘,‘Asia-Pacific‘,660,4400000,106568000000); 157 INSERT INTO bbc VALUES (‘lovakia‘,‘Europe‘,49033,5400000,34992000000); 158 INSERT INTO bbc VALUES (‘Slovenia‘,‘Europe‘,20273,2000000,29620000000); 159 INSERT INTO bbc VALUES (‘Solomon Islands‘,‘Asia-Pacific‘,27556,504000,277200000); 160 -- tabbbc, 151, 50 161 INSERT INTO bbc VALUES (‘Somalia‘,‘Africa‘,637657,10700000,NULL); 162 INSERT INTO bbc VALUES (‘South Africa‘,‘Africa‘,1220000,45300000,164439000000); 163 INSERT INTO bbc VALUES (‘South Korea‘,‘Asia-Pacific‘,99313,48200000,673836000000); 164 INSERT INTO bbc VALUES (‘Spain‘,‘Europe‘,505988,44100000,935361000000); 165 INSERT INTO bbc VALUES (‘Sri Lanka‘,‘South Asia‘,65610,19400000,19594000000); 166 INSERT INTO bbc VALUES (‘St Kitts and Nevis‘,‘Americas‘,269,46000,NULL); 167 INSERT INTO bbc VALUES (‘St Lucia‘,‘Americas‘,616,152000,655120000); 168 INSERT INTO bbc VALUES (‘St Vincent and the Grenadines‘,‘Americas‘,389,121000,441650000); 169 INSERT INTO bbc VALUES (‘Sudan‘,‘Middle East‘,2500000,35000000,18550000000); 170 INSERT INTO bbc VALUES (‘Surinam‘,‘South America‘,163265,442000,NULL); 171 INSERT INTO bbc VALUES (‘Swaznd‘,‘Africa‘,17364,1100000,1826000000); 172 INSERT INTO bbc VALUES (‘Sweden‘,‘Europe‘,449964,8900000,318353000000); 173 INSERT INTO bbc VALUES (‘Switzerland‘,‘Europe‘,41284,7100000,342433000000); 174 INSERT INTO bbc VALUES (‘Syria‘,‘Middle East‘,185180,18600000,22134000000); 175 INSERT INTO bbc VALUES (‘Taiwan‘,‘Asia-Pacific‘,36188,22700000,302364000000); 176 INSERT INTO bbc VALUES (‘Tajikistan‘,‘Asia-Pacific‘,143100,6300000,NULL); 177 INSERT INTO bbc VALUES (‘Tanzania‘,‘Africa‘,945087,38400000,NULL); 178 INSERT INTO bbc VALUES (‘Thailand‘,‘Asia-Pacific‘,513115,64100000,162814000000); 179 INSERT INTO bbc VALUES (‘The Gambia‘,‘Africa‘,11295,1500000,NULL); 180 INSERT INTO bbc VALUES (‘The Maldives‘,‘South Asia‘,298,338000,848380000); 181 INSERT INTO bbc VALUES (‘The Netherlands‘,‘Europe‘,41864,16300000,516710000000); 182 INSERT INTO bbc VALUES (‘The Philippines‘,‘Asia-Pacific‘,300000,82800000,96876000000); 183 INSERT INTO bbc VALUES (‘Togo‘,‘Africa‘,56785,5100000,1938000000); 184 INSERT INTO bbc VALUES (‘Tonga‘,‘Asia-Pacific‘,748,106000,NULL); 185 INSERT INTO bbc VALUES (‘Trinidad and Tobago‘,‘Americas‘,5128,1300000,NULL); 186 INSERT INTO bbc VALUES (‘Tunisia‘,‘Middle East‘,164150,10000000,26300000000); 187 INSERT INTO bbc VALUES (‘Turkey‘,‘Europe‘,779452,73300000,274875000000); 188 INSERT INTO bbc VALUES (‘Turkmenistan‘,‘Asia-Pacific‘,488100,5000000,NULL); 189 INSERT INTO bbc VALUES (‘Tuvalu‘,‘Asia-Pacific‘,26,10000,NULL); 190 INSERT INTO bbc VALUES (‘Uganda‘,‘Africa‘,241038,27600000,7452000000); 191 INSERT INTO bbc VALUES (‘Ukraine‘,‘Europe‘,603700,47800000,60228000000); 192 INSERT INTO bbc VALUES (‘United Arab Emirates‘,‘Middle East‘,77700,3100000,NULL); 193 INSERT INTO bbc VALUES (‘United Kingdom‘,‘Europe‘,242514,59600000,2022824000000); 194 INSERT INTO bbc VALUES (‘United States of America‘,‘North America‘,9800000,295000000,12213000000000); 195 INSERT INTO bbc VALUES (‘Uruguay‘,‘South America‘,176215,3500000,NULL); 196 INSERT INTO bbc VALUES (‘Uzbekistan‘,‘Asia-Pacific‘,447400,26900000,NULL); 197 INSERT INTO bbc VALUES (‘Vanuatu‘,‘Asia-Pacific‘,12190,222000,297480000); 198 INSERT INTO bbc VALUES (‘Vatican‘,‘Europe‘,0,NULL,NULL); 199 INSERT INTO bbc VALUES (‘Venezuela‘,‘South America‘,881050,26600000,NULL); 200 INSERT INTO bbc VALUES (‘Vietnam‘,‘Asia-Pacific‘,329247,83600000,45980000000); 201 INSERT INTO bbc VALUES (‘Yemen‘,‘Middle East‘,536869,21500000,12255000000); 202 INSERT INTO bbc VALUES (‘Zambia‘,‘Africa‘,752614,11000000,4950000000); 203 INSERT INTO bbc VALUES (‘Zimbabwe‘,‘Africa‘,390759,12900000,6192000000); 204 205 206 SELECT * FROM bbc 207 -- 显示世界人口总和 208 SELECT SUM(population) FROM bbc; 209 210 -- 列出所有的地区，每个地区只显示一次 211 SELECT DISTINCT region FROM bbc; 212 SELECT region FROM bbc GROUP BY region; 213 214 -- 显示GDP超过所有Africa国家总和的国家 215 SELECT * FROM bbc WHERE gdp> 216 (SELECT SUM(gdp) FROM bbc WHERE region=‘Africa‘) 217 218 -- 显示每个地区及该地区国家总数 219 SELECT region,COUNT(*) FROM bbc GROUP BY region; 220 221 -- 显示每个地区的总人口数和总面积，以总人口排序 222 SELECT SUM(population) p,SUM(contryArea) c FROM bbc GROUP BY region 223 ORDER BY p DESC; 224 225 -- 显示每个地区以及该地区国家总人口数不少于10000000的国家总数 226 SELECT region,COUNT(*) FROM bbc GROUP BY region HAVING SUM(population)>= 227 10000000 228 229 -- 列出人口总数不少于100000000的地区 230 SELECT region FROM bbc GROUP BY region HAVING SUM(population)>=100000000 231 232 -- 显示欧州人口总数和总GDP 233 SELECT SUM(population),SUM(gdp) FROM bbc WHERE region=‘Europe‘ 234 235 -- 显示每个地区的总人口数和总面积，以总人口排序，仅显示那些面积超过1000000的地区 236 SELECT SUM(population) p,SUM(contryArea) c FROM bbc GROUP BY region 237 HAVING c>1000000 ORDER BY p; 238 239 CREATE TABLE bbc( 240 contryName VARCHAR(50) NOT NULL -- 国家名称 241 ,region VARCHAR(60) -- 地区 242 ,contryArea DECIMAL(10) -- 面积 243 ,population DECIMAL(11) -- 人口 244 ,gdp DECIMAL(14) -- GDP 245 ,PRIMARY KEY (contryName) 246 )DEFAULT CHARSET=utf8; 247 248 249 -- 获得到和‘Brazil’同属一个地区的所有国家 250 SELECT * FROM bbc WHERE region= 251 (SELECT region FROM bbc WHERE contryName=‘Brazil‘); 252 253 -- 给出人口多于Russia的国家名称 254 SELECT * FROM bbc WHERE population> 255 (SELECT population FROM bbc WHERE contryName=‘Russia‘) 256 257 -- 给出‘India‘,‘Iran‘所在地区的所有国家信息 258 SELECT * FROM bbc WHERE region IN 259 (SELECT region FROM bbc WHERE contryName IN (‘India‘,‘Iran‘)) 260 261 -- 给出人均gdp超过‘United Kingdom‘(英国)的欧州国家 262 SELECT * FROM bbc WHERE region=‘Europe‘ AND gdp/population > 263 (SELECT gdp/population FROM bbc WHERE contryName=‘United Kingdom‘) 264 265 -- 给出人口比‘Canada‘多但少于Algeria的国家的信息 266 SELECT * FROM bbc WHERE contryName !=‘Canada‘ AND contryName !=‘Algeria‘ AND population 267 BETWEEN(SELECT population FROM bbc WHERE contryName=‘Canada‘) AND (SELECT population FROM bbc WHERE contryName =‘Algeria‘) 268 269 SELECT * FROM bbc WHERE population> 270 (SELECT population FROM bbc WHERE contryName=‘Canada‘) AND population <( SELECT population FROM bbc WHERE contryName =‘Algeria‘) 271 272 -- 给出gdp比任何欧州国家都多的国家 273 SELECT * FROM bbc WHERE gdp > 274 (SELECT MAX(gdp) FROM bbc WHERE region=‘Europe‘) 275 -- 给出每个地区人口最大的国家 276 277 SELECT * FROM bbc p1 WHERE population IN 278 (SELECT MAX(population) FROM bbc p2 WHERE p1.region=p2.region GROUP BY region) 279 280 -- 给出地区中所有国家的人口总数为0的地区 281 282 SELECT region FROM bbc GROUP BY region HAVING SUM(population)=0 283 284 -- 有些国家的人口数比她的周边国家要多三倍，请列出这些国家和地区。 285 SELECT * FROM bbc c1 WHERE population > 286 (SELECT population*4 FROM bbc c2 WHERE c1.region =c2.region GROUP BY region ) 287 288 289 SELECT * FROM bbc c1 WHERE population > 290 4*(SELECT MAX(population) FROM bbc c2 WHERE c1.region =c2.region AND c1.contryName !=c2.contryName GROUP BY region )
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