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interesting queries

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Motiejus Jakštys 2019-10-26 17:28:09 +03:00
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MTM/task4-straipsnis/straipsnis.md
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@ -80,7 +80,7 @@ SELECT
b.country AS b_country, b.country AS b_country,
b.name AS b_name, b.name AS b_name,
b.iata AS b_iata, b.iata AS b_iata,
to_char(st_distance (a.geom, b.geom, FALSE) / 1000, '99999.99') AS distance_km to_char(st_distance (a.geom, b.geom, TRUE) / 1000, '99999.99') AS distance_km
FROM FROM
airports a, airports a,
airports b airports b
@ -91,9 +91,21 @@ WHERE
ORDER BY ORDER BY
distance_km DESC distance_km DESC
LIMIT 10; LIMIT 10;
a_country | a_name | a_iata | b_country | b_name | b_iata | distance_km
------------------+-------------------------------------+--------+-------------------------+------------------------------------+--------+-------------
China | Zhangjiakou Ningyuan Airport | ZQZ | Argentina | Antoine de Saint Exupéry Airport | OES | 20002.42
Saudi Arabia | King Khaled Air Base | KMX | French Polynesia | Pukarua Airport | PUK | 20000.78
Indonesia | Radin Inten II (Branti) Airport | TKG | Colombia | Mariquita Airport | MQU | 20000.53
French Polynesia | Napuka Island Airport | NAU | Ethiopia | Axum Airport | AXU | 20000.47
Nicaragua | Corn Island | RNI | Cocos (Keeling) Islands | Cocos (Keeling) Islands Airport | CCK | 20000.20
China | Jinggangshan Airport | JGS | Argentina | Teniente Benjamin Matienzo Airport | TUC | 19999.93
Malaysia | Long Lellang Airport | LGL | Brazil | Tefé Airport | TFF | 19998.43
New Zealand | Hamilton International Airport | HLZ | Spain | Córdoba Airport | ODB | 19998.36
Indonesia | Sultan Mahmud Badaruddin II Airport | PLM | Colombia | Benito Salas Airport | NVA | 19998.19
Malaysia | Sultan Ismail Petra Airport | KBR | Peru | Chachapoyas Airport | CHH | 19998.13
``` ```
**Kurie du oro uosta yra arčiausiai vienas kito?** **Kurie oro uostai yra arčiausiai vienas kito?**
``` ```
SELECT SELECT
a.country AS a_country, a.country AS a_country,
@ -102,7 +114,7 @@ SELECT
b.country AS b_country, b.country AS b_country,
b.name AS b_name, b.name AS b_name,
b.iata AS b_iata, b.iata AS b_iata,
to_char(st_distance (a.geom, b.geom, FALSE) / 1000, '0.99') AS distance_km to_char(st_distance (a.geom, b.geom, TRUE) / 1000, '99999.99') AS distance_km
FROM FROM
airports a, airports a,
airports b airports b
@ -113,10 +125,20 @@ WHERE
ORDER BY ORDER BY
distance_km ASC distance_km ASC
LIMIT 10; LIMIT 10;
a_country | a_name | a_iata | b_country | b_name | b_iata | distance_km
------------------+---------------------------------------+--------+------------------+-----------------------------------------------------+--------+-------------
Australia | Shute Harbour Airport | JHQ | Australia | Whitsunday Island Airport | WSY | 0.14
Papua New Guinea | Nadunumu Airport | NDN | Papua New Guinea | Kagi Airport | KGW | 1.83
Papua New Guinea | Kagi Airport | KGW | Papua New Guinea | Efogi Airport | EFG | 2.24
Rwanda | Gisenyi Airport | GYI | Congo (Kinshasa) | Goma International Airport | GOM | 2.38
United Kingdom | Westray Airport | WRY | United Kingdom | Papa Westray Airport | PPW | 2.83
Papua New Guinea | Nadunumu Airport | NDN | Papua New Guinea | Efogi Airport | EFG | 2.92
Papua New Guinea | Bodinumu Airport | BNM | Papua New Guinea | Kagi Airport | KGW | 3.13
Virgin Islands | Charlotte Amalie Harbor Seaplane Base | SPB | Virgin Islands | Cyril E. King Airport | STT | 3.46
United States | Brown Field Municipal Airport | SDM | Mexico | General Abelardo L. Rodríguez International Airport | TIJ | 3.59
French Guiana | Saint-Laurent-du-Maroni Airport | LDX | Suriname | Albina Airport | ABN | 3.71
``` ```
Pakeitus `DESC` į `ASC` ankstesnėje užklausoje gauname:
**Kokį atstumą skristume aplink žemę, jei iš Vilniaus skristume ta pačia platuma?** **Kokį atstumą skristume aplink žemę, jei iš Vilniaus skristume ta pačia platuma?**
**Kiek kartų reikia nuskristi United Economy klase aplink žemę Vilniaus **Kiek kartų reikia nuskristi United Economy klase aplink žemę Vilniaus
platumoje, kad uždirbtume [nemokamus pusryčius][2]?** platumoje, kad uždirbtume [nemokamus pusryčius][2]?**