[英]Case statements, subqueries, DATEPART function, DATENAME function
我需要構造一個查詢以使用SQL從下表中查找以下信息:
查找曾經在周六起飛並在周日降落的航班的其他乘客的姓名。
這是數據庫模式中的表:
Company table
ID_comp name
------------
1 Don_avia
2 Aeroflot
3 Dale_avia
4 air_France
5 British_AW
Passenger table
ID_psg name
-----------
1 Bruce Willis
2 George Clooney
3 Kevin Costner
4 Donald Sutherland
5 Jennifer Lopez
6 Ray Liotta
7 Samuel L. Jackson
8 Nikole Kidman
9 Alan Rickman
10 Kurt Russell
11 Harrison Ford
12 Russell Crowe
13 Steve Martin
14 Michael Caine
15 Angelina Jolie
16 Mel Gibson
17 Michael Douglas
18 John Travolta
19 Sylvester Stallone
20 Tommy Lee Jones
21 Catherine Zeta-Jones
22 Antonio Banderas
23 Kim Basinger
24 Sam Neill
25 Gary Oldman
26 Clint Eastwood
27 Brad Pitt
28 Johnny Depp
29 Pierce Brosnan
30 Sean Connery
31 Bruce Willis
37 Mullah Omar
Pass_in_trip table
trip_no date ID_psg place
-------------------------
1100 2003-04-29 00:00:00.000 1 1a
1123 2003-04-05 00:00:00.000 3 2a
1123 2003-04-08 00:00:00.000 1 4c
1123 2003-04-08 00:00:00.000 6 4b
1124 2003-04-02 00:00:00.000 2 2d
1145 2003-04-05 00:00:00.000 3 2c
1145 2003-04-25 00:00:00.000 5 1d
1181 2003-04-01 00:00:00.000 1 1a
1181 2003-04-01 00:00:00.000 6 1b
1181 2003-04-01 00:00:00.000 8 3c
1181 2003-04-13 00:00:00.000 5 1b
1182 2003-04-13 00:00:00.000 5 4b
1182 2003-04-13 00:00:00.000 9 6d
1187 2003-04-14 00:00:00.000 8 3a
1187 2003-04-14 00:00:00.000 10 3d
1188 2003-04-01 00:00:00.000 8 3a
7771 2005-11-04 00:00:00.000 11 4a
7771 2005-11-07 00:00:00.000 11 1b
7771 2005-11-07 00:00:00.000 37 1c
7771 2005-11-09 00:00:00.000 11 5a
7771 2005-11-14 00:00:00.000 14 4d
7771 2005-11-16 00:00:00.000 14 5d
7772 2005-11-07 00:00:00.000 12 1d
7772 2005-11-07 00:00:00.000 37 1a
7772 2005-11-29 00:00:00.000 10 3a
7772 2005-11-29 00:00:00.000 13 1b
7772 2005-11-29 00:00:00.000 14 1c
7773 2005-11-07 00:00:00.000 13 2d
7778 2005-11-05 00:00:00.000 10 2a
8881 2005-11-08 00:00:00.000 37 1d
8882 2005-11-06 00:00:00.000 37 1a
8882 2005-11-13 00:00:00.000 14 3d
Trip table
trip_no ID_comp plane town_from town_to time_out time_in
--------------------------------------------------------
1100 4 Boeing Rostov Paris 1900-01-01 14:30:00.000 1900-01-01 17:50:00.000
1101 4 Boeing Paris Rostov 1900-01-01 08:12:00.000 1900-01-01 11:45:00.000
1123 3 TU-154 Rostov Vladivostok 1900-01-01 16:20:00.000 1900-01-01 03:40:00.000
1124 3 TU-154 Vladivostok Rostov 1900-01-01 09:00:00.000 1900-01-01 19:50:00.000
1145 2 IL-86 Moscow Rostov 1900-01-01 09:35:00.000 1900-01-01 11:23:00.000
1146 2 IL-86 Rostov Moscow 1900-01-01 17:55:00.000 1900-01-01 20:01:00.000
1181 1 TU-134 Rostov Moscow 1900-01-01 06:12:00.000 1900-01-01 08:01:00.000
1182 1 TU-134 Moscow Rostov 1900-01-01 12:35:00.000 1900-01-01 14:30:00.000
1187 1 TU-134 Rostov Moscow 1900-01-01 15:42:00.000 1900-01-01 17:39:00.000
1188 1 TU-134 Moscow Rostov 1900-01-01 22:50:00.000 1900-01-01 00:48:00.000
1195 1 TU-154 Rostov Moscow 1900-01-01 23:30:00.000 1900-01-01 01:11:00.000
1196 1 TU-154 Moscow Rostov 1900-01-01 04:00:00.000 1900-01-01 05:45:00.000
7771 5 Boeing London Singapore 1900-01-01 01:00:00.000 1900-01-01 11:00:00.000
7772 5 Boeing Singapore London 1900-01-01 12:00:00.000 1900-01-01 02:00:00.000
7773 5 Boeing London Singapore 1900-01-01 03:00:00.000 1900-01-01 13:00:00.000
7774 5 Boeing Singapore London 1900-01-01 14:00:00.000 1900-01-01 06:00:00.000
7775 5 Boeing London Singapore 1900-01-01 09:00:00.000 1900-01-01 20:00:00.000
7776 5 Boeing Singapore London 1900-01-01 18:00:00.000 1900-01-01 08:00:00.000
7777 5 Boeing London Singapore 1900-01-01 18:00:00.000 1900-01-01 06:00:00.000
7778 5 Boeing Singapore London 1900-01-01 22:00:00.000 1900-01-01 12:00:00.000
8881 5 Boeing London Paris 1900-01-01 03:00:00.000 1900-01-01 04:00:00.000
8882 5 Boeing Paris London 1900-01-01 22:00:00.000 1900-01-01 23:00:00.000
關於如何格式化最后一個表格的任何建議也將不勝感激,在過去的一個小時中,我一直在嘗試對其進行修復!
如果我們假設一個航班最多不超過24小時,那么我們要做的就是查找從星期六開始的航班,並在time_out
之前添加一個time_in
值。 使用MSSQL可能看起來像這樣:
select p.name
from Pass_in_trip pit
join Trip t on t.trip_no = pit.trip_no
join Passenger p on pit.ID_psg = p.ID_psg
where DATENAME(dw, pit.date) = 'Saturday'
and t.time_in < t.time_out
使用您的樣本數據將返回:
Kevin Costner
Kurt Russell
當然,如果一次旅行可能花費超過24小時,則無法確定飛行是否發生在兩個日期之間,因為數據模型不會記錄該情況。
對於Oracle,您可以像這樣to_char(date, 'DAY') = 'Saturday'
進行工作日檢查,但是我無法進行測試。
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