This repository has been archived by the owner on Jul 3, 2019. It is now read-only.
-
Notifications
You must be signed in to change notification settings - Fork 0
/
queries.php
1182 lines (1033 loc) · 56.9 KB
/
queries.php
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
<!DOCTYPE html>
<html lang="en">
<head>
<title>Urbanspork</title>
<link rel="icon" href="utensil-spoon.ico">
<meta charset="utf-8">
<meta name="viewport" content="width=device-width, initial-scale=1, shrink-to-fit=no">
<link rel="stylesheet" href="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/css/bootstrap.min.css" integrity="sha384-Gn5384xqQ1aoWXA+058RXPxPg6fy4IWvTNh0E263XmFcJlSAwiGgFAW/dAiS6JXm" crossorigin="anonymous">
<link rel="stylesheet" href="css/style.css">
<script defer src="https://use.fontawesome.com/releases/v5.0.9/js/solid.js" integrity="sha384-P4tSluxIpPk9wNy8WSD8wJDvA8YZIkC6AQ+BfAFLXcUZIPQGu4Ifv4Kqq+i2XzrM" crossorigin="anonymous"></script>
<script defer src="https://use.fontawesome.com/releases/v5.0.9/js/fontawesome.js" integrity="sha384-2IUdwouOFWauLdwTuAyHeMMRFfeyy4vqYNjodih+28v2ReC+8j+sLF9cK339k5hY" crossorigin="anonymous"></script>
<script defer src="https://code.jquery.com/jquery-3.2.1.slim.min.js" integrity="sha384-KJ3o2DKtIkvYIK3UENzmM7KCkRr/rE9/Qpg6aAZGJwFDMVNA/GpGFF93hXpG5KkN" crossorigin="anonymous"></script>
<script defer src="https://cdnjs.cloudflare.com/ajax/libs/popper.js/1.12.9/umd/popper.min.js" integrity="sha384-ApNbgh9B+Y1QKtv3Rn7W3mgPxhU9K/ScQsAP7hUibX39j7fakFPskvXusvfa0b4Q" crossorigin="anonymous"></script>
<script defer src="https://maxcdn.bootstrapcdn.com/bootstrap/4.0.0/js/bootstrap.min.js" integrity="sha384-JZR6Spejh4U02d8jOt6vLEHfe/JQGiRRSQQxSfFWpi1MquVdAyjUar5+76PVCmYl" crossorigin="anonymous"></script>
</head>
<body>
<nav class="navbar navbar-expand-md navbar-light bg-light mb-4">
<a class="navbar-brand" href="index.php"><i class="fas fa-utensil-spoon"></i> Urbanspork</a>
<button class="navbar-toggler" type="button" data-toggle="collapse" data-target="#navbarCollapse" aria-controls="navbarCollapse" aria-expanded="false" aria-label="Toggle navigation">
<span class="navbar-toggler-icon"></span>
</button>
<div class="collapse navbar-collapse" id="navbarCollapse">
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="index.php"><i class="fas fa-home"></i> Home<span class="sr-only">(current)</span></a>
</li>
<li class="nav-item">
<a class="nav-link" href="restaurants.php"><i class="fas fa-utensils"></i> Restaurants</a>
</li>
<li class="nav-item">
<a class="nav-link" href="ratings.php"><i class="fas fa-thumbs-up"></i> Ratings</a>
</li>
<li class="nav-item">
<a class="nav-link" href="raters.php"><i class="fas fa-pencil-alt"></i> Raters</a>
</li>
<li class="nav-item active">
<a class="nav-link" href="queries.php"><i class="fas fa-database"></i> Queries</a>
</li>
</ul>
</div>
</nav>
<!-- -->
<main role="main" class="container">
<div class="jumbotron">
<?php
if ($_POST['query'] != null) {
$query = $_POST['query'];
include 'connection.php';
if ($query == "Queries/a.sql") {
if ($_POST['a'] != null) {
$name = $_POST['a'];
} else {
$name = "*";
}
echo "<h2>Query A</h2>";
echo "<p>Display all the information about a user‐specified restaurant. That is, the user should select the
name of the restaurant from a list, and the information as contained in the restaurant and
location tables should then displayed on the screen.</p>";
$query = "SELECT restaurant.name, restaurant.type, restaurant.url, location.firstopendate, location.managername, location.phonenumber, location.streetaddress, location.houropen, location.hourclose
FROM RESTAURANT
INNER JOIN LOCATION ON RESTAURANT.RestaurantID = LOCATION.RestaurantID
WHERE restaurant.name = '$name';";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Name</th>\n";
echo "<th scope=\"col\">Type</th>\n";
echo "<th scope=\"col\">Url</th>\n";
echo "<th scope=\"col\">First Open Date</th>\n";
echo "<th scope=\"col\">Manager Name</th>\n";
echo "<th scope=\"col\">Phone Number</th>\n";
echo "<th scope=\"col\">Street Address</th>\n";
echo "<th scope=\"col\">Opening Hour</th>\n";
echo "<th scope=\"col\">Closing Hour</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT restaurant.name, restaurant.type, restaurant.url, location.firstopendate, location.managername, location.phonenumber, location.streetaddress, location.houropen, location.hourclose
FROM RESTAURANT
INNER JOIN LOCATION ON RESTAURANT.RestaurantID = LOCATION.RestaurantID
WHERE restaurant.name = '$name';") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$name = $result['name'];
$type = $result['type'];
$url = $result['url'];
$firstopendate = $result['firstopendate'];
$managername = $result['managername'];
$phonenumber = $result['phonenumber'];
$streetaddress = $result['streetaddress'];
$houropen = $result['houropen'];
$hourclose = $result['hourclose'];
echo "<tr>\n";
echo "<td>$name</td>\n";
echo "<td>$type</td>\n";
echo "<td>$url</td>\n";
echo "<td>$firstopendate</td>";
echo "<td>$managername</td>";
echo "<td>$phonenumber</td>";
echo "<td>$streetaddress</td>";
echo "<td>$houropen</td>";
echo "<td>$hourclose</td>";
echo "</tr>\n";
}
} else if ($query == "Queries/b.sql") {
if ($_POST['b'] != null) {
$name = $_POST['b'];
} else {
$name = "*";
}
echo "<h2>Query B</h2>";
echo "<p>Display the full menu of a specific restaurant. That is, the user should select the name of the
restaurant from a list, and all menu items, together with their prices, should be displayed on the
screen. The menu should be displayed based on menu item categories.</p>";
$query = "SELECT menuitem.name, menuitem.type, menuitem.category, menuitem.description
FROM menuitem
INNER JOIN restaurant ON menuitem.restaurantid = restaurant.restaurantid
WHERE restaurant.name = '$name'
ORDER BY menuitem.category DESC;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Name</th>\n";
echo "<th scope=\"col\">Type</th>\n";
echo "<th scope=\"col\">Category</th>\n";
echo "<th scope=\"col\">Description</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT menuitem.name, menuitem.type, menuitem.category, menuitem.description
FROM menuitem
INNER JOIN restaurant ON menuitem.restaurantid = restaurant.restaurantid
WHERE restaurant.name = '$name'
ORDER BY menuitem.category DESC;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$name = $result['name'];
$type = $result['type'];
$category = $result['category'];
$description = $result['description'];
echo "<tr>\n";
echo "<td>$name</td>\n";
echo "<td>$type</td>\n";
echo "<td>$category</td>\n";
echo "<td>$description</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/c.sql") {
if ($_POST['c'] != null) {
$name = $_POST['c'];
} else {
$name = "*";
}
echo "<h2>Query C</h2>";
echo "<p> For each user‐specified category of restaurant, list the manager names together with the date
that the locations have opened. The user should be able to select the category (e.g. Italian or
Thai) from a list.</p>";
$query = "SELECT restaurant.name, location.managername, location.firstopendate
FROM location
INNER JOIN restaurant ON location.restaurantid = restaurant.restaurantid
WHERE restaurant.type = '$name';";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Name</th>\n";
echo "<th scope=\"col\">Manager Name</th>\n";
echo "<th scope=\"col\">First Open Date</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT restaurant.name, location.managername, location.firstopendate
FROM location
INNER JOIN restaurant ON location.restaurantid = restaurant.restaurantid
WHERE restaurant.type = '$name';") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$name = $result['name'];
$managername = $result['managername'];
$firstopendate = $result['firstopendate'];
echo "<tr>\n";
echo "<td>$name</td>\n";
echo "<td>$managername</td>\n";
echo "<td>$firstopendate</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/d.sql") {
if ($_POST['d'] != null) {
$name = $_POST['d'];
} else {
$name = "*";
}
echo "<h2>Query D</h2>";
echo "<p>Given a user‐specified restaurant, find the name of the most expensive menu item. List this
information together with the name of manager, the opening hours, and the URL of the
restaurant. The user should be able to select the restaurant name (e.g. El Camino) from a list.</p>";
$query = "SELECT menuitem.name, location.managername, location.houropen, restaurant.url
FROM menuitem
JOIN restaurant ON menuitem.restaurantid = restaurant.restaurantid
JOIN location ON restaurant.restaurantid = location.restaurantid
WHERE menuitem.price IN (
SELECT MAX(menuitem.price)
FROM menuitem
JOIN restaurant ON menuitem.restaurantid = restaurant.restaurantid
WHERE restaurant.name = '$name'
GROUP BY menuitem.restaurantid);";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Name</th>\n";
echo "<th scope=\"col\">Manager Name</th>\n";
echo "<th scope=\"col\">Hour Open</th>\n";
echo "<th scope=\"col\">Url</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT menuitem.name, location.managername, location.houropen, restaurant.url
FROM menuitem
JOIN restaurant ON menuitem.restaurantid = restaurant.restaurantid
JOIN location ON restaurant.restaurantid = location.restaurantid
WHERE menuitem.price IN (
SELECT MAX(menuitem.price)
FROM menuitem
JOIN restaurant ON menuitem.restaurantid = restaurant.restaurantid
WHERE restaurant.name = '$name'
GROUP BY menuitem.restaurantid);") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$name = $result['name'];
$managername = $result['managername'];
$houropen = $result['houropen'];
$url = $result['url'];
echo "<tr>\n";
echo "<td>$name</td>\n";
echo "<td>$managername</td>\n";
echo "<td>$houropen</td>\n";
echo "<td>$url</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/e.sql") {
/*
if ($_POST['name'] != null) {
$name = $_POST['name'];
} else {
$name = "*";
}
*/
echo "<h2>Query E</h2>";
echo "<p> For each type of restaurant (e.g. Indian or Irish) and the category of menu item (appetiser, main
or desert), list the average prices of menu items for each category.</p>";
$query = "SELECT restaurant.type, menuitem.category, CAST(AVG(CAST(menuitem.price AS decimal)) AS money)
FROM menuitem, RESTAURANT
WHERE restaurant.restaurantid = MENUITEM.RestaurantID
GROUP BY 1, 2
ORDER BY RESTAURANT.Type;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Type</th>\n";
echo "<th scope=\"col\">Category</th>\n";
echo "<th scope=\"col\">Average</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT restaurant.type, menuitem.category, CAST(AVG(CAST(menuitem.price AS decimal)) AS money)
FROM menuitem, RESTAURANT
WHERE restaurant.restaurantid = MENUITEM.RestaurantID
GROUP BY 1, 2
ORDER BY RESTAURANT.Type;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$type = $result['type'];
$category = $result['category'];
$avg = $result['avg'];
echo "<tr>\n";
echo "<td>$type</td>\n";
echo "<td>$category</td>\n";
echo "<td>$avg</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/e.sql") {
/*
if ($_POST['name'] != null) {
$name = $_POST['name'];
} else {
$name = "*";
}
*/
echo "<h2>Query E</h2>";
echo "<p> For each type of restaurant (e.g. Indian or Irish) and the category of menu item (appetiser, main
or desert), list the average prices of menu items for each category.</p>";
$query = "SELECT restaurant.type, menuitem.category, CAST(AVG(CAST(menuitem.price AS decimal)) AS money)
FROM menuitem, RESTAURANT
WHERE restaurant.restaurantid = MENUITEM.RestaurantID
GROUP BY 1, 2
ORDER BY RESTAURANT.Type;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Type</th>\n";
echo "<th scope=\"col\">Category</th>\n";
echo "<th scope=\"col\">Average</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT restaurant.type, menuitem.category, CAST(AVG(CAST(menuitem.price AS decimal)) AS money)
FROM menuitem, RESTAURANT
WHERE restaurant.restaurantid = MENUITEM.RestaurantID
GROUP BY 1, 2
ORDER BY RESTAURANT.Type;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$type = $result['type'];
$category = $result['category'];
$avg = $result['avg'];
echo "<tr>\n";
echo "<td>$type</td>\n";
echo "<td>$category</td>\n";
echo "<td>$avg</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/f.sql") {
/*
if ($_POST['name'] != null) {
$name = $_POST['name'];
} else {
$name = "*";
}
*/
echo "<h2>Query F</h2>";
echo "<p>Find the total number of rating for each restaurant, for each rater. That is, the data should be
grouped by the restaurant, the specific raters and the numeric ratings they have received.</p>";
$query = "SELECT restaurant.name as restaurant, tmp.name as rater, number_rating FROM
(SELECT rating.restaurantid, rater.name, COUNT(rating.food) AS number_rating
FROM restaurants.rating
JOIN restaurants.rater ON rating.userid = rater.userid
GROUP BY rater.name, rating.restaurantid ORDER BY rating.restaurantid) as tmp
LEFT OUTER JOIN restaurants.restaurant ON tmp.restaurantid = restaurant.restaurantid";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Restaurant Name</th>\n";
echo "<th scope=\"col\">Rater Name</th>\n";
echo "<th scope=\"col\">Number of Rating</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query($query) or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$name = $result['restaurant'];
$rater = $result['rater'];
$number_rating = $result['number_rating'];
echo "<tr>\n";
echo "<td>$name</td>\n";
echo "<td>$rater</td>\n";
echo "<td>$number_rating</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/g.sql") {
/*
if ($_POST['name'] != null) {
$name = $_POST['name'];
} else {
$name = "*";
}
*/
echo "<h2>Query G</h2>";
echo "<p> Display the details of the restaurants that have not been rated in January 2015. That is, you should display the name of the
restaurant together with the phone number and the type of food.</p>";
$query = "SELECT restaurant.name, location.phonenumber, restaurant.type
FROM restaurant, location
WHERE EXISTS (SELECT *
FROM restaurant, rating
WHERE restaurant.restaurantid = rating.restaurantid AND
rating.date NOT BETWEEN '2015-01-01' AND '2015-12-31') AND location.restaurantid = restaurant.restaurantid;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Restaurant Name</th>\n";
echo "<th scope=\"col\">Phone Number</th>\n";
echo "<th scope=\"col\">Restaurant Type</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT restaurant.name, location.phonenumber, restaurant.type
FROM restaurant, location
WHERE EXISTS (SELECT *
FROM restaurant, rating
WHERE restaurant.restaurantid = rating.restaurantid AND
rating.date NOT BETWEEN '2015-01-01' AND '2015-12-31') AND location.restaurantid = restaurant.restaurantid;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$name = $result['name'];
$phonenumber = $result['phonenumber'];
$type = $result['type'];
echo "<tr>\n";
echo "<td>$name</td>\n";
echo "<td>$phonenumber</td>\n";
echo "<td>$type</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/h.sql") {
if ($_POST['h'] != null) {
$name = $_POST['h'];
} else {
$name = "*";
}
echo "<h2>Query H</h2>";
echo "<p> Find the names and opening dates of the restaurants that obtained Staff rating that is lower
than any rating given by rater X. Order your results by the dates of the ratings. (Here, X refers to
any rater of your choice.)</p>";
$query = "SELECT DISTINCT *
FROM (
SELECT restaurant.name AS Name, location.firstopendate AS First_Open_Date
FROM restaurant
JOIN location ON location.restaurantid = restaurant.restaurantid
JOIN rating ON rating.restaurantid = restaurant.restaurantid
WHERE rating.staff <= (
SELECT MIN(mintable.submin)
FROM (
SELECT rating.userid,
CASE WHEN rating.price < rating.food AND rating.price < rating.mood AND rating.price < rating.staff THEN rating.price
WHEN rating.food < rating.price AND rating.food < rating.mood AND rating.food < rating.staff THEN rating.food
WHEN rating.mood < rating.price AND rating.mood < rating.food AND rating.mood < rating.staff THEN rating.mood
ELSE rating.staff
END AS submin
From rating
JOIN rater ON rating.userid = rater.userid
WHERE rater.name = '$name') AS mintable)
) AS noduptable
ORDER BY noduptable.First_Open_Date;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Restaurant Name</th>\n";
echo "<th scope=\"col\">First Open Date</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT DISTINCT *
FROM (
SELECT restaurant.name AS Name, location.firstopendate AS First_Open_Date
FROM restaurant
JOIN location ON location.restaurantid = restaurant.restaurantid
JOIN rating ON rating.restaurantid = restaurant.restaurantid
WHERE rating.staff <= (
SELECT MIN(mintable.submin)
FROM (
SELECT rating.userid,
CASE WHEN rating.price < rating.food AND rating.price < rating.mood AND rating.price < rating.staff THEN rating.price
WHEN rating.food < rating.price AND rating.food < rating.mood AND rating.food < rating.staff THEN rating.food
WHEN rating.mood < rating.price AND rating.mood < rating.food AND rating.mood < rating.staff THEN rating.mood
ELSE rating.staff
END AS submin
From rating
JOIN rater ON rating.userid = rater.userid
WHERE rater.name = '$name') AS mintable)
) AS noduptable
ORDER BY noduptable.First_Open_Date;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$name = $result['name'];
$firstopendate = $result['first_open_date'];
echo "<tr>\n";
echo "<td>$name</td>\n";
echo "<td>$firstopendate</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/i.sql") {
if ($_POST['i'] != null) {
$name = $_POST['i'];
} else {
$name = "*";
}
echo "<h2>Query I</h2>";
echo "<p> List the details of the Type Y restaurants that obtained the highest Food rating. Display the
restaurant name together with the name(s) of the rater(s) who gave these ratings. (Here, Type Y refers to any
restaurant type of your choice, e.g. Indian or Burger.)</p>";
$query = "SELECT DISTINCT *
FROM (
SELECT restaurant.name AS rename, rater.name AS raname
FROM ( SELECT restaurant.restaurantid, MAX(rating.food)
FROM rating, restaurant
GROUP BY restaurant.restaurantid) AS tmp, rating
JOIN restaurant ON restaurant.restaurantid = rating.restaurantid
JOIN rater ON rater.userid = rating.userid
WHERE restaurant.type = '$name' AND tmp.restaurantid = restaurant.restaurantid) AS tmp
ORDER BY tmp.rename;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Restaurant NAME</th>\n";
echo "<th scope=\"col\">Rater Name</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT DISTINCT *
FROM (
SELECT restaurant.name AS rename, rater.name AS raname
FROM ( SELECT restaurant.restaurantid, MAX(rating.food)
FROM rating, restaurant
GROUP BY restaurant.restaurantid) AS tmp, rating
JOIN restaurant ON restaurant.restaurantid = rating.restaurantid
JOIN rater ON rater.userid = rating.userid
WHERE restaurant.type = '$name' AND tmp.restaurantid = restaurant.restaurantid) AS tmp
ORDER BY tmp.rename;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$rename = $result['rename'];
$raname = $result['raname'];
echo "<tr>\n";
echo "<td>$rename</td>\n";
echo "<td>$raname</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/j.sql") {
if ($_POST['j'] != null) {
$name = $_POST['j'];
} else {
$name = "*";
}
echo "<h2>Query J</h2>";
echo "<p> Provide a query to determine whether Type Y restaurants are “more popular” than other restaurants.
(Here, Type Y refers to any restaurant type of your choice, e.g. Indian or Burger.) Yes, this query
is open to your own interpretation!</p>";
$query = "SELECT DISTINCT *
FROM (
SELECT restaurant.name AS rename, rater.name AS raname
FROM ( SELECT restaurant.restaurantid, MAX(rating.mood)
FROM rating, restaurant
GROUP BY restaurant.restaurantid) AS tmp, rating
JOIN restaurant ON restaurant.restaurantid = rating.restaurantid
JOIN rater ON rater.userid = rating.userid
WHERE restaurant.type = '$name' AND tmp.restaurantid = restaurant.restaurantid) AS tmp
ORDER BY tmp.rename;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Restaurant Name</th>\n";
echo "<th scope=\"col\">Rater Name</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT DISTINCT *
FROM (
SELECT restaurant.name AS rename, rater.name AS raname
FROM ( SELECT restaurant.restaurantid, MAX(rating.mood)
FROM rating, restaurant
GROUP BY restaurant.restaurantid) AS tmp, rating
JOIN restaurant ON restaurant.restaurantid = rating.restaurantid
JOIN rater ON rater.userid = rating.userid
WHERE restaurant.type = '$name' AND tmp.restaurantid = restaurant.restaurantid) AS tmp
ORDER BY tmp.rename;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$rename = $result['rename'];
$raname = $result['raname'];
echo "<tr>\n";
echo "<td>$rename</td>\n";
echo "<td>$raname</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/k.sql") {
/*
if ($_POST['name'] != null) {
$name = $_POST['name'];
} else {
$name = "*";
}
*/
echo "<h2>Query K</h2>";
echo "<p> Find the names, join‐date and reputations of the raters that give the highest overall rating, in
terms of the Food and the Mood of restaurants. Display this information together with the
names of the restaurant and the dates the ratings were done.</p>";
$query = "SELECT rater.name AS raname, rater.joindate, rater.reputation, restaurant.name AS rename, rating.date
FROM rating
JOIN rater ON rater.userid = rating.userid
JOIN restaurant ON rating.restaurantid = restaurant.restaurantid
WHERE rating.food IN (SELECT MAX(rating.food)
FROM rating) OR rating.mood IN (SELECT MAX(rating.mood)
FROM rating);";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Rater Name</th>\n";
echo "<th scope=\"col\">Rater Join Date</th>\n";
echo "<th scope=\"col\">Rater Reputation</th>\n";
echo "<th scope=\"col\">Restaurant Name</th>\n";
echo "<th scope=\"col\">Rating Date</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT rater.name AS raname, rater.joindate, rater.reputation, restaurant.name AS rename, rating.date
FROM rating
JOIN rater ON rater.userid = rating.userid
JOIN restaurant ON rating.restaurantid = restaurant.restaurantid
WHERE rating.food IN (SELECT MAX(rating.food)
FROM rating) OR rating.mood IN (SELECT MAX(rating.mood)
FROM rating);") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$raname = $result['raname'];
$joindate = $result['joindate'];
$reputation = $result['reputation'];
$rename = $result['rename'];
$date = $result['date'];
echo "<tr>\n";
echo "<td>$raname</td>\n";
echo "<td>$joindate</td>\n";
echo "<td>$reputation</td>\n";
echo "<td>$rename</td>\n";
echo "<td>$date</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/l.sql") {
/*
if ($_POST['name'] != null) {
$name = $_POST['name'];
} else {
$name = "*";
}
*/
echo "<h2>Query L</h2>";
echo "<p>Find the names and reputations of the raters that give the highest overall rating, in terms of the
Food or the Mood of restaurants. Display this information together with the names of the
restaurant and the dates the ratings were done.</p>";
$query = "SELECT rater.name AS raname, rater.reputation, restaurant.name AS rename, rating.date
FROM rating
JOIN rater ON rater.userid = rating.userid
JOIN restaurant ON rating.restaurantid = restaurant.restaurantid
WHERE rating.food IN (SELECT MAX(rating.food)
FROM rating) OR rating.mood IN (SELECT MAX(rating.mood)
FROM rating);";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Rater Name</th>\n";
echo "<th scope=\"col\">Rater Reputation</th>\n";
echo "<th scope=\"col\">Restaurant Name</th>\n";
echo "<th scope=\"col\">Rating Date</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT rater.name AS raname, rater.reputation, restaurant.name AS rename, rating.date
FROM rating
JOIN rater ON rater.userid = rating.userid
JOIN restaurant ON rating.restaurantid = restaurant.restaurantid
WHERE rating.food IN (SELECT MAX(rating.food)
FROM rating) OR rating.mood IN (SELECT MAX(rating.mood)
FROM rating);") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$raname = $result['raname'];
$reputation = $result['reputation'];
$rename = $result['rename'];
$date = $result['date'];
echo "<tr>\n";
echo "<td>$raname</td>\n";
echo "<td>$reputation</td>\n";
echo "<td>$rename</td>\n";
echo "<td>$date</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/m.sql") {
if ($_POST['m'] != null) {
$name = $_POST['m'];
} else {
$name = "*";
}
echo "<h2>Query M</h2>";
echo "<p> Find the names and reputations of the raters that rated a specific restaurant (say Restaurant Z)
the most frequently. Display this information together with their comments and the names and prices
of the menu items they discuss. (Here Restaurant Z refers to a restaurant of your own choice, e.g. Ma Cuisine).</p>";
$query = "SELECT DISTINCT *
FROM (
SELECT rater.name AS raname, rater.reputation, rating.comments, menuitem.name AS mname, menuitem.price
FROM (SELECT rater.userid AS userid, rating.restaurantid AS restaurantid, SUM(rating.restaurantid) AS smu
FROM rating
JOIN rater ON rating.userid = rater.userid
JOIN restaurant ON rating.RestaurantID = RESTAURANT.RestaurantID
WHERE RESTAURANT.name = '$name'
GROUP BY 1, rating.restaurantid) AS tmp, rater, rating, menuitem, ratingitem
WHERE tmp.smu IN (SELECT MAX(tmp.smu) FROM (SELECT rater.userid AS userid, rating.restaurantid AS restaurantid, SUM(rating.restaurantid) AS smu
FROM rating
JOIN rater ON rating.userid = rater.userid
JOIN restaurant ON rating.RestaurantID = RESTAURANT.RestaurantID
WHERE RESTAURANT.name = '$name'
GROUP BY 1, rating.restaurantid) AS tmp)
AND tmp.userid = rater.userid AND tmp.userid = rating.userid
AND tmp.restaurantid = rating.restaurantid AND tmp.userid = ratingitem.userid AND ratingitem.itemid = menuitem.itemid
AND tmp.restaurantid = menuitem.restaurantid) AS finaltable;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Rater Name</th>\n";
echo "<th scope=\"col\">Rater Reputation</th>\n";
echo "<th scope=\"col\">Comments</th>\n";
echo "<th scope=\"col\">Menu Item Name</th>\n";
echo "<th scope=\"col\">Price</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT DISTINCT *
FROM (
SELECT rater.name AS raname, rater.reputation, rating.comments, menuitem.name AS mname, menuitem.price
FROM (SELECT rater.userid AS userid, rating.restaurantid AS restaurantid, SUM(rating.restaurantid) AS smu
FROM rating
JOIN rater ON rating.userid = rater.userid
JOIN restaurant ON rating.RestaurantID = RESTAURANT.RestaurantID
WHERE RESTAURANT.name = '$name'
GROUP BY 1, rating.restaurantid) AS tmp, rater, rating, menuitem, ratingitem
WHERE tmp.smu IN (SELECT MAX(tmp.smu) FROM (SELECT rater.userid AS userid, rating.restaurantid AS restaurantid, SUM(rating.restaurantid) AS smu
FROM rating
JOIN rater ON rating.userid = rater.userid
JOIN restaurant ON rating.RestaurantID = RESTAURANT.RestaurantID
WHERE RESTAURANT.name = '$name'
GROUP BY 1, rating.restaurantid) AS tmp)
AND tmp.userid = rater.userid AND tmp.userid = rating.userid
AND tmp.restaurantid = rating.restaurantid AND tmp.userid = ratingitem.userid AND ratingitem.itemid = menuitem.itemid
AND tmp.restaurantid = menuitem.restaurantid) AS finaltable;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$raname = $result['raname'];
$reputation = $result['reputation'];
$comments = $result['comments'];
$mname = $result['mname'];
$price = $result['price'];
echo "<tr>\n";
echo "<td>$raname</td>\n";
echo "<td>$reputation</td>\n";
echo "<td>$comments</td>\n";
echo "<td>$mname</td>\n";
echo "<td>$price</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/n.sql") {
/*
if ($_POST['name'] != null) {
$name = $_POST['name'];
} else {
$name = "*";
}
*/
echo "<h2>Query N</h2>";
echo "<p> Find the names and emails of all raters who gave ratings that are lower than that of a rater with a name
called John, in terms of the combined rating of Price, Food, Mood and Staff. (Note that there may be more than one rater with this name).</p>";
$query = "SELECT rater.name, rater.email
FROM
(SELECT rating.userid, (SUM(rating.price) + SUM(rating.food) + SUM(rating.mood) + SUM(rating.staff)) AS sumrating
FROM rating
GROUP BY 1) AS combinedrating,
(SELECT rating.userid, (SUM(rating.price) + SUM(rating.food) + SUM(rating.mood) + SUM(rating.staff)) AS sumrating
FROM rating, rater
WHERE rating.UserID = rater.userid AND rater.name = 'John'
GROUP BY 1) AS combinedjohn, RATER
WHERE combinedrating.sumrating < combinedjohn.sumrating AND combinedrating.userid = rater.userid;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Rater Name</th>\n";
echo "<th scope=\"col\">Rater Email</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT rater.name, rater.email
FROM
(SELECT rating.userid, (SUM(rating.price) + SUM(rating.food) + SUM(rating.mood) + SUM(rating.staff)) AS sumrating
FROM rating
GROUP BY 1) AS combinedrating,
(SELECT rating.userid, (SUM(rating.price) + SUM(rating.food) + SUM(rating.mood) + SUM(rating.staff)) AS sumrating
FROM rating, rater
WHERE rating.UserID = rater.userid AND rater.name = 'John'
GROUP BY 1) AS combinedjohn, RATER
WHERE combinedrating.sumrating < combinedjohn.sumrating AND combinedrating.userid = rater.userid;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$name = $result['name'];
$email = $result['email'];
echo "<tr>\n";
echo "<td>$name</td>\n";
echo "<td>$email</td>\n";
echo "</tr>\n";
}
} else if ($query == "Queries/o.sql") {
/*
if ($_POST['name'] != null) {
$name = $_POST['name'];
} else {
$name = "*";
}
*/
echo "<h2>Query O</h2>";
echo "<p> Find the names, types and emails of the raters that provide the most diverse ratings. Display this information together
with the restaurants names and the ratings. For example, Jane Doe may have rated the Food at the Imperial Palace restaurant
as a 1 on 1 January 2015, as a 5 on 15 January 2015, and a 3 on 4 February 2015. Clearly, she changes her mind quite often.</p>";
$query = "SELECT DISTINCT rater.name, rater.type, rater.email
FROM rating, rater
WHERE rating.UserID = rater.UserID AND RATING.userid IN (SELECT DISTINCT rating.UserID FROM rating, RESTAURANT WHERE rating.RestaurantID = restaurant.RestaurantID AND rating.food = 10 ORDER BY rating.UserID) AND
rating.userid IN (SELECT DISTINCT rating.UserID FROM rating, RESTAURANT WHERE
rating.RestaurantID = restaurant.RestaurantID AND rating.food = 1 ORDER BY rating.UserID)
ORDER BY rater.name;";
echo "<code>$query</code>";
echo "<h2>$type</h2>\n";
echo "<table class='table'>\n";
echo "<thead>\n";
echo "<tr>\n";
echo "<th scope=\"col\">Rater Name</th>\n";
echo "<th scope=\"col\">Rater Type</th>\n";
echo "<th scope=\"col\">Rater Email</th>\n";
echo "</tr>\n";
echo "</thead>\n";
echo "<tbody>\n";
$results = pg_query("SELECT DISTINCT rater.name, rater.type, rater.email
FROM rating, rater
WHERE rating.UserID = rater.UserID AND RATING.userid IN (SELECT DISTINCT rating.UserID FROM rating, RESTAURANT WHERE rating.RestaurantID = restaurant.RestaurantID AND rating.food = 10 ORDER BY rating.UserID) AND
rating.userid IN (SELECT DISTINCT rating.UserID FROM rating, RESTAURANT WHERE
rating.RestaurantID = restaurant.RestaurantID AND rating.food = 1 ORDER BY rating.UserID)
ORDER BY rater.name;") or die('Query failed: ' . pg_last_error());
while ($result = pg_fetch_array($results, null, PGSQL_ASSOC)) {
$name = $result['name'];
$type = $result['type'];
$email = $result['email'];
echo "<tr>\n";
echo "<td>$name</td>\n";
echo "<td>$type</td>\n";
echo "<td>$email</td>\n";
echo "</tr>\n";
}
}
} else {
echo "<h1>Queries</h1>\n";
echo "<br>";
echo "<form action='queries.php' method='post'>\n";
echo "\t<h3>Restaurants and Menus</h3>\n";
echo "<br>";
echo "<p>A) Restaurant Information:</p>";
echo "<div class='row'>\n";
echo "<div class='col-md-3'>\n";
echo "Enter Restaurant Name:\n";
echo "</div>\n";
echo "<div class='col-md-3'>\n";
echo "<input type='text' name='a' pattern='^[a-zA-Z0-9' ]+$' title='Accepted characters only'><br>\n";
echo "</div>\n";
echo "</div>\n";
echo "\t<button type='submit' class='btn btn-lg btn-light' name='query' value='Queries/a.sql'>A</button>\n";
echo "<br>";
echo "<br>";
echo "<p>B) Restaurant Menu:</p>";
echo "<div class='row'>\n";
echo "<div class='col-md-3'>\n";
echo "Enter Restaurant Name:\n";
echo "</div>\n";
echo "<div class='col-md-3'>\n";
echo "<input type='text' name='b' pattern='^[a-zA-Z0-9' ]+$' title='Accepted characters only'><br>\n";