/
range_vs_index_merge.result
1935 lines (1935 loc) · 69 KB
/
range_vs_index_merge.result
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DROP TABLE IF EXISTS t1,t2,t3,t4;
DROP DATABASE IF EXISTS world;
set names utf8;
CREATE DATABASE world;
use world;
CREATE TABLE Country (
Code char(3) NOT NULL default '',
Name char(52) NOT NULL default '',
SurfaceArea float(10,2) NOT NULL default '0.00',
Population int(11) NOT NULL default '0',
Capital int(11) default NULL,
PRIMARY KEY (Code),
UNIQUE INDEX (Name)
);
CREATE TABLE City (
ID int(11) NOT NULL auto_increment,
Name char(35) NOT NULL default '',
Country char(3) NOT NULL default '',
Population int(11) NOT NULL default '0',
PRIMARY KEY (ID),
INDEX (Population),
INDEX (Country)
);
CREATE TABLE CountryLanguage (
Country char(3) NOT NULL default '',
Language char(30) NOT NULL default '',
Percentage float(3,1) NOT NULL default '0.0',
PRIMARY KEY (Country, Language),
INDEX (Percentage)
);
SELECT COUNT(*) FROM Country;
COUNT(*)
239
SELECT COUNT(*) FROM City;
COUNT(*)
4079
SELECT COUNT(*) FROM CountryLanguage;
COUNT(*)
984
CREATE INDEX Name ON City(Name);
set session optimizer_switch='index_merge_sort_intersection=off';
EXPLAIN
SELECT * FROM City
WHERE (Population >= 100000 OR Name LIKE 'P%' OR Population < 100000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City ALL Population,Name NULL NULL NULL 4079 Using where
EXPLAIN
SELECT * FROM City
WHERE (Population >= 100000 OR Name LIKE 'P%') AND Country='CAN' OR
(Population < 100000 OR Name Like 'T%') AND Country='ARG';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Country 3 NULL 104 Using index condition; Using where
EXPLAIN
SELECT * FROM City
WHERE Population < 200000 AND Name LIKE 'P%' AND
(Population > 300000 OR Name LIKE 'T%') AND
(Population < 100000 OR Name LIKE 'Pa%');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Name Name 35 NULL 135 Using index condition; Using where
EXPLAIN
SELECT * FROM City
WHERE Population > 100000 AND Name LIKE 'Aba%' OR
Country IN ('CAN', 'ARG') AND ID BETWEEN 120 AND 130 OR
Country <= 'ALB' AND Name LIKE 'L%' OR
ID BETWEEN 3807 AND 3810;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge PRIMARY,Population,Country,Name Name,PRIMARY,Country 35,4,3 NULL 30 Using sort_union(Name,PRIMARY,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE (Population > 101000 AND Population < 115000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population Population 4 NULL 459 Using index condition
EXPLAIN
SELECT * FROM City
WHERE (Population > 101000 AND Population < 102000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population Population 4 NULL 39 Using index condition
EXPLAIN
SELECT * FROM City
WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge Country,Name Name,Country 35,3 NULL 172 Using sort_union(Name,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
AND (Population > 101000 AND Population < 115000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge Population,Country,Name Name,Country 35,3 NULL 172 Using sort_union(Name,Country); Using where
EXPLAIN
SELECT * FROM City
WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
AND (Population > 101000 AND Population < 102000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Population 4 NULL 39 Using index condition; Using where
SELECT * FROM City USE INDEX ()
WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
AND (Population > 101000 AND Population < 115000);
ID Name Country Population
403 Catanduva BRA 107761
412 Cachoeirinha BRA 103240
636 Bilbays EGY 113608
637 Mit Ghamr EGY 101801
701 Tarragona ESP 113016
702 Lleida (Lérida) ESP 112207
703 Jaén ESP 109247
704 Ourense (Orense) ESP 109120
705 Mataró ESP 104095
706 Algeciras ESP 103106
707 Marbella ESP 101144
759 Gonder ETH 112249
869 Cabuyao PHL 106630
870 Calapan PHL 105910
873 Cauayan PHL 103952
1844 Cape Breton CAN 114733
1847 Cambridge CAN 109186
2908 Cajamarca PER 108009
3003 Caen FRA 113987
3411 Ceyhan TUR 102412
3571 Calabozo VEN 107146
3786 Cam Ranh VNM 114041
3792 Tartu EST 101246
4002 Carrollton USA 109576
4027 Cape Coral USA 102286
4032 Cambridge USA 101355
SELECT * FROM City
WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
AND (Population > 101000 AND Population < 115000);
ID Name Country Population
403 Catanduva BRA 107761
412 Cachoeirinha BRA 103240
636 Bilbays EGY 113608
637 Mit Ghamr EGY 101801
701 Tarragona ESP 113016
702 Lleida (Lérida) ESP 112207
703 Jaén ESP 109247
704 Ourense (Orense) ESP 109120
705 Mataró ESP 104095
706 Algeciras ESP 103106
707 Marbella ESP 101144
759 Gonder ETH 112249
869 Cabuyao PHL 106630
870 Calapan PHL 105910
873 Cauayan PHL 103952
1844 Cape Breton CAN 114733
1847 Cambridge CAN 109186
2908 Cajamarca PER 108009
3003 Caen FRA 113987
3411 Ceyhan TUR 102412
3571 Calabozo VEN 107146
3786 Cam Ranh VNM 114041
3792 Tartu EST 101246
4002 Carrollton USA 109576
4027 Cape Coral USA 102286
4032 Cambridge USA 101355
SELECT * FROM City USE INDEX ()
WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
AND (Population > 101000 AND Population < 102000);
ID Name Country Population
637 Mit Ghamr EGY 101801
707 Marbella ESP 101144
3792 Tartu EST 101246
4032 Cambridge USA 101355
SELECT * FROM City
WHERE ((Name > 'Ca' AND Name < 'Cf') OR (Country > 'E' AND Country < 'F'))
AND (Population > 101000 AND Population < 102000);
ID Name Country Population
707 Marbella ESP 101144
3792 Tartu EST 101246
4032 Cambridge USA 101355
637 Mit Ghamr EGY 101801
EXPLAIN
SELECT * FROM City WHERE (Name < 'Ac');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 13 Using index condition
EXPLAIN
SELECT * FROM City WHERE (Name < 'Bb');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 207 Using index condition
EXPLAIN
SELECT * FROM City WHERE (Country > 'A' AND Country < 'B');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Country Country 3 NULL 104 Using index condition
EXPLAIN
SELECT * FROM City WHERE (Name BETWEEN 'P' AND 'Pb');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 39 Using index condition
EXPLAIN
SELECT * FROM City WHERE (Name BETWEEN 'P' AND 'S');
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 221 Using index condition
EXPLAIN
SELECT * FROM City WHERE (Population > 101000 AND Population < 110000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population Population 4 NULL 328 Using index condition
EXPLAIN
SELECT * FROM City WHERE (Population > 103000 AND Population < 104000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population Population 4 NULL 37 Using index condition
EXPLAIN
SELECT * FROM City
WHERE (Name < 'Ac' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'Pb' AND (Population > 101000 AND Population < 110000));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population,Country,Name Name 35 NULL 52 Using index condition; Using where
EXPLAIN
SELECT * FROM City
WHERE (Name < 'Ac' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'S' AND (Population > 103000 AND Population < 104000));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge Population,Country,Name Name,Population 35,4 NULL 50 Using sort_union(Name,Population); Using where
EXPLAIN
SELECT * FROM City
WHERE (Name < 'Bb' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'Pb' AND (Population > 101000 AND Population < 110000));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge Population,Country,Name Country,Name 3,35 NULL 143 Using sort_union(Country,Name); Using where
EXPLAIN
SELECT * FROM City
WHERE (Name < 'Bb' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'S' AND (Population > 103000 AND Population < 104000));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge Population,Country,Name Country,Population 3,4 NULL 141 Using sort_union(Country,Population); Using where
SELECT * FROM City USE INDEX ()
WHERE (Name < 'Ac' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'Pb' AND (Population > 101000 AND Population < 110000));
ID Name Country Population
65 Abu Dhabi ARE 398695
168 Pabna BGD 103277
189 Parakou BEN 103577
750 Paarl ZAF 105768
2865 Pak Pattan PAK 107800
SELECT * FROM City
WHERE (Name < 'Ac' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'Pb' AND (Population > 101000 AND Population < 110000));
ID Name Country Population
65 Abu Dhabi ARE 398695
750 Paarl ZAF 105768
168 Pabna BGD 103277
2865 Pak Pattan PAK 107800
189 Parakou BEN 103577
SELECT * FROM City USE INDEX ()
WHERE (Name < 'Ac' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'S' AND (Population > 103000 AND Population < 104000));
ID Name Country Population
65 Abu Dhabi ARE 398695
168 Pabna BGD 103277
189 Parakou BEN 103577
1003 Pemalang IDN 103500
2663 Río Bravo MEX 103901
SELECT * FROM City
WHERE (Name < 'Ac' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'S' AND (Population > 103000 AND Population < 104000));
ID Name Country Population
65 Abu Dhabi ARE 398695
168 Pabna BGD 103277
189 Parakou BEN 103577
1003 Pemalang IDN 103500
2663 Río Bravo MEX 103901
SELECT * FROM City USE INDEX ()
WHERE (Name < 'Bb' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'Pb' AND (Population > 101000 AND Population < 110000));
ID Name Country Population
55 Andorra la Vella AND 21189
65 Abu Dhabi ARE 398695
67 al-Ayn ARE 225970
68 Ajman ARE 114395
75 Almirante Brown ARG 538918
85 Avellaneda ARG 353046
96 Bahía Blanca ARG 239810
134 Adelaide AUS 978100
144 Baku AZE 1787800
168 Pabna BGD 103277
189 Parakou BEN 103577
750 Paarl ZAF 105768
2865 Pak Pattan PAK 107800
SELECT * FROM City
WHERE (Name < 'Bb' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'Pb' AND (Population > 101000 AND Population < 110000));
ID Name Country Population
55 Andorra la Vella AND 21189
65 Abu Dhabi ARE 398695
67 al-Ayn ARE 225970
68 Ajman ARE 114395
75 Almirante Brown ARG 538918
85 Avellaneda ARG 353046
96 Bahía Blanca ARG 239810
134 Adelaide AUS 978100
144 Baku AZE 1787800
168 Pabna BGD 103277
189 Parakou BEN 103577
750 Paarl ZAF 105768
2865 Pak Pattan PAK 107800
SELECT * FROM City USE INDEX ()
WHERE (Name < 'Bb' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'S' AND (Population > 103000 AND Population < 104000));
ID Name Country Population
55 Andorra la Vella AND 21189
65 Abu Dhabi ARE 398695
67 al-Ayn ARE 225970
68 Ajman ARE 114395
75 Almirante Brown ARG 538918
85 Avellaneda ARG 353046
96 Bahía Blanca ARG 239810
134 Adelaide AUS 978100
144 Baku AZE 1787800
168 Pabna BGD 103277
189 Parakou BEN 103577
1003 Pemalang IDN 103500
2663 Río Bravo MEX 103901
SELECT * FROM City
WHERE (Name < 'Bb' AND (Country > 'A' AND Country < 'B')) OR
(Name BETWEEN 'P' AND 'S' AND (Population > 103000 AND Population < 104000));
ID Name Country Population
55 Andorra la Vella AND 21189
65 Abu Dhabi ARE 398695
67 al-Ayn ARE 225970
68 Ajman ARE 114395
75 Almirante Brown ARG 538918
85 Avellaneda ARG 353046
96 Bahía Blanca ARG 239810
134 Adelaide AUS 978100
144 Baku AZE 1787800
168 Pabna BGD 103277
189 Parakou BEN 103577
1003 Pemalang IDN 103500
2663 Río Bravo MEX 103901
EXPLAIN
SELECT * FROM City WHERE (ID < 10) OR (ID BETWEEN 100 AND 110);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 20 Using index condition; Using where
EXPLAIN
SELECT * FROM City WHERE (ID < 200) OR (ID BETWEEN 100 AND 200);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 200 Using index condition; Using where
EXPLAIN
SELECT * FROM City WHERE (ID < 600) OR (ID BETWEEN 900 AND 1500);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City ALL PRIMARY NULL NULL NULL 4079 Using where
EXPLAIN
SELECT * FROM City WHERE Country > 'A' AND Country < 'ARG';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Country Country 3 NULL 20 Using index condition
EXPLAIN
SELECT * FROM City WHERE Name LIKE 'H%' OR Name LIKE 'P%' ;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 223 Using index condition; Using where
EXPLAIN
SELECT * FROM City WHERE Name LIKE 'Ha%' OR Name LIKE 'Pa%' ;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 72 Using index condition; Using where
EXPLAIN
SELECT * FROM City
WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
OR ((ID BETWEEN 100 AND 110) AND
(Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country,Name PRIMARY 4 NULL 20 Using index condition; Using where
EXPLAIN
SELECT * FROM City
WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
OR ((ID BETWEEN 900 AND 1500) AND
(Name LIKE 'Pa%' OR (Population > 103000 AND Population < 105000)));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge PRIMARY,Population,Country,Name Name,Country,Population 35,3,4 NULL 151 Using sort_union(Name,Country,Population); Using where
EXPLAIN
SELECT * FROM City
WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
OR ((ID BETWEEN 100 AND 200) AND
(Name LIKE 'Pa%' OR (Population > 103200 AND Population < 104000)));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge PRIMARY,Population,Country,Name Name,Country,Population 35,3,4 NULL 124 Using sort_union(Name,Country,Population); Using where
SELECT * FROM City USE INDEX ()
WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
OR ((ID BETWEEN 100 AND 110) AND
(Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
ID Name Country Population
1 Kabul AFG 1780000
2 Qandahar AFG 237500
3 Herat AFG 186800
4 Mazar-e-Sharif AFG 127800
7 Haag NLD 440900
100 Paraná ARG 207041
102 Posadas ARG 201273
SELECT * FROM City
WHERE ((ID < 10) AND (Name LIKE 'H%' OR (Country > 'A' AND Country < 'ARG')))
OR ((ID BETWEEN 100 AND 110) AND
(Name LIKE 'P%' OR (Population > 103000 AND Population < 104000)));
ID Name Country Population
1 Kabul AFG 1780000
2 Qandahar AFG 237500
3 Herat AFG 186800
4 Mazar-e-Sharif AFG 127800
7 Haag NLD 440900
100 Paraná ARG 207041
102 Posadas ARG 201273
SELECT * FROM City USE INDEX()
WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
OR ((ID BETWEEN 900 AND 1500) AND
(Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
ID Name Country Population
1 Kabul AFG 1780000
2 Qandahar AFG 237500
3 Herat AFG 186800
4 Mazar-e-Sharif AFG 127800
7 Haag NLD 440900
16 Haarlem NLD 148772
25 Haarlemmermeer NLD 110722
33 Willemstad ANT 2345
34 Tirana ALB 270000
55 Andorra la Vella AND 21189
56 Luanda AGO 2022000
57 Huambo AGO 163100
58 Lobito AGO 130000
59 Benguela AGO 128300
60 Namibe AGO 118200
61 South Hill AIA 961
62 The Valley AIA 595
64 Dubai ARE 669181
65 Abu Dhabi ARE 398695
66 Sharja ARE 320095
67 al-Ayn ARE 225970
68 Ajman ARE 114395
129 Oranjestad ABW 29034
191 Hamilton BMU 1200
528 Hartlepool GBR 92000
529 Halifax GBR 91069
914 Sekondi-Takoradi GHA 103653
943 Palembang IDN 1222764
950 Padang IDN 534474
983 Palu IDN 142800
984 Pasuruan IDN 134019
991 Pangkal Pinang IDN 124000
1003 Pemalang IDN 103500
1004 Klaten IDN 103300
1007 Palangka Raya IDN 99693
1020 Padang Sidempuan IDN 91200
1045 Patna IND 917243
1114 Panihati IND 275990
1129 Patiala IND 238368
1142 Panipat IND 215218
1159 Parbhani IND 190255
1231 Pali IND 136842
1263 Pathankot IND 123930
1265 Palghat (Palakkad) IND 123289
1293 Pallavaram IND 111866
1319 Tellicherry (Thalassery) IND 103579
1339 Palayankottai IND 97662
1345 Patan IND 96109
1436 Marv Dasht IRN 103579
1468 Palermo ITA 683794
1478 Padova ITA 211391
1484 Parma ITA 168717
SELECT * FROM City
WHERE ((ID < 800) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
OR ((ID BETWEEN 900 AND 1500) AND
(Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
ID Name Country Population
1 Kabul AFG 1780000
2 Qandahar AFG 237500
3 Herat AFG 186800
4 Mazar-e-Sharif AFG 127800
7 Haag NLD 440900
16 Haarlem NLD 148772
25 Haarlemmermeer NLD 110722
33 Willemstad ANT 2345
34 Tirana ALB 270000
55 Andorra la Vella AND 21189
56 Luanda AGO 2022000
57 Huambo AGO 163100
58 Lobito AGO 130000
59 Benguela AGO 128300
60 Namibe AGO 118200
61 South Hill AIA 961
62 The Valley AIA 595
64 Dubai ARE 669181
65 Abu Dhabi ARE 398695
66 Sharja ARE 320095
67 al-Ayn ARE 225970
68 Ajman ARE 114395
129 Oranjestad ABW 29034
191 Hamilton BMU 1200
528 Hartlepool GBR 92000
529 Halifax GBR 91069
914 Sekondi-Takoradi GHA 103653
943 Palembang IDN 1222764
950 Padang IDN 534474
983 Palu IDN 142800
984 Pasuruan IDN 134019
991 Pangkal Pinang IDN 124000
1003 Pemalang IDN 103500
1004 Klaten IDN 103300
1007 Palangka Raya IDN 99693
1020 Padang Sidempuan IDN 91200
1045 Patna IND 917243
1114 Panihati IND 275990
1129 Patiala IND 238368
1142 Panipat IND 215218
1159 Parbhani IND 190255
1231 Pali IND 136842
1263 Pathankot IND 123930
1265 Palghat (Palakkad) IND 123289
1293 Pallavaram IND 111866
1319 Tellicherry (Thalassery) IND 103579
1339 Palayankottai IND 97662
1345 Patan IND 96109
1436 Marv Dasht IRN 103579
1468 Palermo ITA 683794
1478 Padova ITA 211391
1484 Parma ITA 168717
SELECT * FROM City USE INDEX ()
WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
OR ((ID BETWEEN 100 AND 200) AND
(Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
ID Name Country Population
1 Kabul AFG 1780000
2 Qandahar AFG 237500
3 Herat AFG 186800
4 Mazar-e-Sharif AFG 127800
7 Haag NLD 440900
16 Haarlem NLD 148772
25 Haarlemmermeer NLD 110722
33 Willemstad ANT 2345
34 Tirana ALB 270000
55 Andorra la Vella AND 21189
56 Luanda AGO 2022000
57 Huambo AGO 163100
58 Lobito AGO 130000
59 Benguela AGO 128300
60 Namibe AGO 118200
61 South Hill AIA 961
62 The Valley AIA 595
64 Dubai ARE 669181
65 Abu Dhabi ARE 398695
66 Sharja ARE 320095
67 al-Ayn ARE 225970
68 Ajman ARE 114395
100 Paraná ARG 207041
129 Oranjestad ABW 29034
167 Jamalpur BGD 103556
168 Pabna BGD 103277
189 Parakou BEN 103577
191 Hamilton BMU 1200
SELECT * FROM City
WHERE ((ID < 200) AND (Name LIKE 'Ha%' OR (Country > 'A' AND Country < 'ARG')))
OR ((ID BETWEEN 100 AND 200) AND
(Name LIKE 'Pa%' OR (Population > 103000 AND Population < 104000)));
ID Name Country Population
1 Kabul AFG 1780000
2 Qandahar AFG 237500
3 Herat AFG 186800
4 Mazar-e-Sharif AFG 127800
7 Haag NLD 440900
16 Haarlem NLD 148772
25 Haarlemmermeer NLD 110722
33 Willemstad ANT 2345
34 Tirana ALB 270000
55 Andorra la Vella AND 21189
56 Luanda AGO 2022000
57 Huambo AGO 163100
58 Lobito AGO 130000
59 Benguela AGO 128300
60 Namibe AGO 118200
61 South Hill AIA 961
62 The Valley AIA 595
64 Dubai ARE 669181
65 Abu Dhabi ARE 398695
66 Sharja ARE 320095
67 al-Ayn ARE 225970
68 Ajman ARE 114395
100 Paraná ARG 207041
129 Oranjestad ABW 29034
167 Jamalpur BGD 103556
168 Pabna BGD 103277
189 Parakou BEN 103577
191 Hamilton BMU 1200
EXPLAIN
SELECT * FROM City WHERE Population > 101000 AND Population < 102000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population Population 4 NULL 39 Using index condition
EXPLAIN
SELECT * FROM City WHERE Population > 101000 AND Population < 110000;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population Population 4 NULL 328 Using index condition
EXPLAIN
SELECT * FROM City WHERE Country < 'C';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Country Country 3 NULL 435 Using index condition
EXPLAIN
SELECT * FROM City WHERE Country < 'AGO';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Country Country 3 NULL 5 Using index condition
EXPLAIN
SELECT * FROM City WHERE Name BETWEEN 'P' AND 'S';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 221 Using index condition
EXPLAIN
SELECT * FROM City WHERE Name BETWEEN 'P' AND 'Pb';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 39 Using index condition
EXPLAIN
SELECT * FROM City WHERE ID BETWEEN 3400 AND 3800;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 401 Using index condition
EXPLAIN
SELECT * FROM City WHERE ID BETWEEN 3790 AND 3800;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 11 Using index condition
EXPLAIN
SELECT * FROM City WHERE Name LIKE 'P%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 135 Using index condition
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 102000) AND
(Country < 'C' OR Name BETWEEN 'P' AND 'S')) OR
((ID BETWEEN 3400 AND 3800) AND
(Country < 'AGO' OR Name LIKE 'Pa%'));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge PRIMARY,Population,Country,Name Country,Name,Population 3,35,4 NULL 83 Using sort_union(Country,Name,Population); Using where
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 110000) AND
(Country < 'AGO' OR Name BETWEEN 'P' AND 'Pb')) OR
((ID BETWEEN 3790 AND 3800) AND
(Country < 'C' OR Name LIKE 'P%'));
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge PRIMARY,Population,Country,Name Country,Name,PRIMARY 3,35,4 NULL 55 Using sort_union(Country,Name,PRIMARY); Using where
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 AND Population < 102000) AND
(Country < 'C' OR Name BETWEEN 'P' AND 'S')) OR
((ID BETWEEN 3400 AND 3800) AND
(Country < 'AGO' OR Name LIKE 'Pa%'));
ID Name Country Population
169 Naogaon BGD 101266
205 Francistown BWA 101805
417 Itaituba BRA 101320
418 Araras BRA 101046
751 Potchefstroom ZAF 101817
2909 Puno PER 101578
3463 Pavlograd UKR 127000
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 102000) AND
(Country < 'C' OR Name BETWEEN 'P' AND 'S')) OR
((ID BETWEEN 3400 AND 3800) AND
(Country < 'AGO' OR Name LIKE 'Pa%'));
ID Name Country Population
169 Naogaon BGD 101266
205 Francistown BWA 101805
417 Itaituba BRA 101320
418 Araras BRA 101046
751 Potchefstroom ZAF 101817
2909 Puno PER 101578
3463 Pavlograd UKR 127000
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 AND Population < 110000) AND
(Country < 'AGO' OR Name BETWEEN 'P' AND 'Pb')) OR
((ID BETWEEN 3790 AND 3800) AND
(Country < 'C' OR Name LIKE 'P%'));
ID Name Country Population
168 Pabna BGD 103277
189 Parakou BEN 103577
750 Paarl ZAF 105768
2865 Pak Pattan PAK 107800
3797 Philadelphia USA 1517550
3798 Phoenix USA 1321045
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 110000) AND
(Country < 'AGO' OR Name BETWEEN 'P' AND 'Pb')) OR
((ID BETWEEN 3790 AND 3800) AND
(Country < 'C' OR Name LIKE 'P%'));
ID Name Country Population
168 Pabna BGD 103277
189 Parakou BEN 103577
750 Paarl ZAF 105768
2865 Pak Pattan PAK 107800
3797 Philadelphia USA 1517550
3798 Phoenix USA 1321045
CREATE INDEX CountryPopulation ON City(Country,Population);
EXPLAIN
SELECT * FROM City WHERE Name LIKE 'Pas%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 4 Using index condition
EXPLAIN
SELECT * FROM City WHERE Name LIKE 'P%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 135 Using index condition
EXPLAIN
SELECT * FROM City WHERE (Population > 101000 AND Population < 103000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population Population 4 NULL 81 Using index condition
EXPLAIN
SELECT * FROM City WHERE Country='USA';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City ref Country,CountryPopulation Country 3 const 267 Using index condition
EXPLAIN
SELECT * FROM City WHERE Country='FIN';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City ref Country,CountryPopulation Country 3 const 7 Using index condition
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'Pas%')
AND Country='USA';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge Population,Country,Name,CountryPopulation CountryPopulation,Name 7,35 NULL 14 Using sort_union(CountryPopulation,Name); Using where
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
AND Country='FIN';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City ref Population,Country,Name,CountryPopulation Country 3 const 7 Using index condition; Using where
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'Pas%')
AND Country='USA';
ID Name Country Population
3943 Pasadena USA 141674
3953 Pasadena USA 133936
4023 Gary USA 102746
4024 Berkeley USA 102743
4025 Santa Clara USA 102361
4026 Green Bay USA 102313
4027 Cape Coral USA 102286
4028 Arvada USA 102153
4029 Pueblo USA 102121
4030 Sandy USA 101853
4031 Athens-Clarke County USA 101489
4032 Cambridge USA 101355
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'Pas%')
AND Country='USA';
ID Name Country Population
3943 Pasadena USA 141674
3953 Pasadena USA 133936
4023 Gary USA 102746
4024 Berkeley USA 102743
4025 Santa Clara USA 102361
4026 Green Bay USA 102313
4027 Cape Coral USA 102286
4028 Arvada USA 102153
4029 Pueblo USA 102121
4030 Sandy USA 101853
4031 Athens-Clarke County USA 101489
4032 Cambridge USA 101355
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
AND Country='FIN';
ID Name Country Population
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 AND Population < 103000) OR Name LIKE 'P%')
AND Country='FIN';
ID Name Country Population
CREATE INDEX CountryName ON City(Country,Name);
EXPLAIN
SELECT * FROM City WHERE Country='USA';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City ref Country,CountryPopulation,CountryName Country 3 const 267 Using index condition
EXPLAIN
SELECT * FROM City WHERE Country='FIN';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City ref Country,CountryPopulation,CountryName CountryName 3 const 5 Using index condition
EXPLAIN
SELECT * FROM City WHERE Country='BRA';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City ref Country,CountryPopulation,CountryName CountryName 3 const 221 Using index condition
EXPLAIN
SELECT * FROM City WHERE ID BETWEEN 3790 AND 3800;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 11 Using index condition
EXPLAIN
SELECT * FROM City WHERE ID BETWEEN 4025 AND 4035;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 11 Using index condition
EXPLAIN
SELECT * FROM City WHERE ID BETWEEN 4028 AND 4032;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 5 Using index condition
EXPLAIN
SELECT * FROM City WHERE ID BETWEEN 3500 AND 3800;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 301 Using index condition
EXPLAIN
SELECT * FROM City WHERE ID BETWEEN 4000 AND 4300;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 80 Using index condition
EXPLAIN
SELECT * FROM City WHERE ID BETWEEN 250 and 260 ;
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY PRIMARY 4 NULL 11 Using index condition
EXPLAIN
SELECT * FROM City WHERE (Population > 101000 AND Population < 102000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population Population 4 NULL 39 Using index condition
EXPLAIN
SELECT * FROM City WHERE (Population > 101000 AND Population < 103000);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Population Population 4 NULL 81 Using index condition
EXPLAIN
SELECT * FROM City WHERE Name LIKE 'Pa%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range Name Name 35 NULL 41 Using index condition
set @tmp_range_vs_index_merge=@@optimizer_switch;
set optimizer_switch='extended_keys=off';
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='USA'
AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge PRIMARY,Population,Country,Name,CountryPopulation,CountryName CountryPopulation,PRIMARY 7,4 NULL 14 Using sort_union(CountryPopulation,PRIMARY); Using where
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 103000) OR
ID BETWEEN 3790 AND 3800) AND Country='USA'
AND (Name LIKE 'Pa%' OR ID BETWEEN 4028 AND 4032);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge PRIMARY,Population,Country,Name,CountryPopulation,CountryName CountryName,PRIMARY 38,4 NULL 11 Using sort_union(CountryName,PRIMARY); Using where
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 110000) OR
ID BETWEEN 3500 AND 3800) AND Country='FIN'
AND (Name BETWEEN 'P' AND 'T' OR ID BETWEEN 4000 AND 4300);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City ref PRIMARY,Population,Country,Name,CountryPopulation,CountryName CountryName 3 const 5 Using index condition; Using where
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 AND Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='USA'
AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
ID Name Country Population
4030 Sandy USA 101853
4031 Athens-Clarke County USA 101489
4032 Cambridge USA 101355
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='USA'
AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
ID Name Country Population
4030 Sandy USA 101853
4031 Athens-Clarke County USA 101489
4032 Cambridge USA 101355
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 AND Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='USA'
AND (Name LIKE 'Pa%' OR ID BETWEEN 4028 AND 4032);
ID Name Country Population
4030 Sandy USA 101853
4031 Athens-Clarke County USA 101489
4032 Cambridge USA 101355
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='USA'
AND (Name LIKE 'Pa%' OR ID BETWEEN 4028 AND 4032);
ID Name Country Population
4030 Sandy USA 101853
4031 Athens-Clarke County USA 101489
4032 Cambridge USA 101355
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 AND Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='FIN'
AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
ID Name Country Population
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='FIN'
AND (Name LIKE 'Pa%' OR ID BETWEEN 4025 AND 4035);
ID Name Country Population
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 and Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='USA'
OR (Name LIKE 'Pa%' OR ID BETWEEN 250 AND 260) AND Country='BRA';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge PRIMARY,Population,Country,Name,CountryPopulation,CountryName CountryPopulation,PRIMARY,CountryName 7,4,38 NULL 35 Using sort_union(CountryPopulation,PRIMARY,CountryName); Using where
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 and Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='USA'
OR (Name LIKE 'Pa%' OR ID BETWEEN 250 AND 260) AND Country='BRA';
ID Name Country Population
250 Mauá BRA 375055
251 Carapicuíba BRA 357552
252 Olinda BRA 354732
253 Campina Grande BRA 352497
254 São José do Rio Preto BRA 351944
255 Caxias do Sul BRA 349581
256 Moji das Cruzes BRA 339194
257 Diadema BRA 335078
258 Aparecida de Goiânia BRA 324662
259 Piracicaba BRA 319104
260 Cariacica BRA 319033
285 Paulista BRA 248473
339 Passo Fundo BRA 166343
364 Parnaíba BRA 129756
372 Paranaguá BRA 126076
379 Palmas BRA 121919
386 Patos de Minas BRA 119262
424 Passos BRA 98570
430 Paulo Afonso BRA 97291
435 Parnamirim BRA 96210
448 Patos BRA 90519
451 Palhoça BRA 89465
3793 New York USA 8008278
3794 Los Angeles USA 3694820
3795 Chicago USA 2896016
3796 Houston USA 1953631
3797 Philadelphia USA 1517550
3798 Phoenix USA 1321045
3799 San Diego USA 1223400
3800 Dallas USA 1188580
4030 Sandy USA 101853
4031 Athens-Clarke County USA 101489
4032 Cambridge USA 101355
SELECT * FROM City
WHERE ((Population > 101000 and Population < 102000) OR
ID BETWEEN 3790 AND 3800) AND Country='USA'
OR (Name LIKE 'Pa%' OR ID BETWEEN 250 AND 260) AND Country='BRA';
ID Name Country Population
250 Mauá BRA 375055
251 Carapicuíba BRA 357552
252 Olinda BRA 354732
253 Campina Grande BRA 352497
254 São José do Rio Preto BRA 351944
255 Caxias do Sul BRA 349581
256 Moji das Cruzes BRA 339194
257 Diadema BRA 335078
258 Aparecida de Goiânia BRA 324662
259 Piracicaba BRA 319104
260 Cariacica BRA 319033
285 Paulista BRA 248473
339 Passo Fundo BRA 166343
364 Parnaíba BRA 129756
372 Paranaguá BRA 126076
379 Palmas BRA 121919
386 Patos de Minas BRA 119262
424 Passos BRA 98570
430 Paulo Afonso BRA 97291
435 Parnamirim BRA 96210
448 Patos BRA 90519
451 Palhoça BRA 89465
3793 New York USA 8008278
3794 Los Angeles USA 3694820
3795 Chicago USA 2896016
3796 Houston USA 1953631
3797 Philadelphia USA 1517550
3798 Phoenix USA 1321045
3799 San Diego USA 1223400
3800 Dallas USA 1188580
4030 Sandy USA 101853
4031 Athens-Clarke County USA 101489
4032 Cambridge USA 101355
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 11000) OR
ID BETWEEN 3500 AND 3800) AND Country='USA'
AND (Name LIKE 'P%' OR ID BETWEEN 4000 AND 4300);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country,Name,CountryPopulation,CountryName CountryName 38 NULL 23 Using index condition; Using where
EXPLAIN
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 11000) OR
ID BETWEEN 3500 AND 3800) AND Country='USA'
AND (Name LIKE 'Pho%' OR ID BETWEEN 4000 AND 4300);
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City range PRIMARY,Population,Country,Name,CountryPopulation,CountryName Name 35 NULL 1 Using where
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 AND Population < 11000) OR
ID BETWEEN 3500 AND 3800) AND Country='USA'
AND (Name LIKE 'P%' OR ID BETWEEN 4000 AND 4300);
ID Name Country Population
3797 Philadelphia USA 1517550
3798 Phoenix USA 1321045
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 11000) OR
ID BETWEEN 3500 AND 3800) AND Country='USA'
AND (Name LIKE 'P%' OR ID BETWEEN 4000 AND 4300);
ID Name Country Population
3797 Philadelphia USA 1517550
3798 Phoenix USA 1321045
SELECT * FROM City USE INDEX ()
WHERE ((Population > 101000 AND Population < 11000) OR
ID BETWEEN 3500 AND 3800) AND Country='USA'
AND (Name LIKE 'Pho%' OR ID BETWEEN 4000 AND 4300);
ID Name Country Population
3798 Phoenix USA 1321045
SELECT * FROM City
WHERE ((Population > 101000 AND Population < 11000) OR
ID BETWEEN 3500 AND 3800) AND Country='USA'
AND (Name LIKE 'Pho%' OR ID BETWEEN 4000 AND 4300);
ID Name Country Population
3798 Phoenix USA 1321045
DROP INDEX Population ON City;
DROP INDEX Name ON City;
set optimizer_switch=@tmp_range_vs_index_merge;
EXPLAIN
SELECT * FROM City
WHERE Country='USA' AND Population BETWEEN 101000 AND 102000 OR
Country='USA' AND Name LIKE 'Pa%';
id select_type table type possible_keys key key_len ref rows Extra
1 SIMPLE City index_merge Country,CountryPopulation,CountryName CountryPopulation,CountryName 7,38 NULL 10 Using sort_union(CountryPopulation,CountryName); Using where
SELECT * FROM City USE INDEX()
WHERE Country='USA' AND Population BETWEEN 101000 AND 102000 OR
Country='USA' AND Name LIKE 'Pa%';
ID Name Country Population