Wed Nov 20 15:58:26 PST 2024

assets/slides/20.sql

@@ -0,0 +1,25 @@
+
+-- Parents
+create table parents as
+  select "a" as parent, "b" as child union
+  select "a"          , "c"          union
+  select "d"          , "h"          union
+  select "f"          , "a"          union
+  select "f"          , "d"          union
+  select "f"          , "g"          union
+  select "e"          , "f";
+
+
+-- Spotify
+create table spotify as
+  select "wildflower" as track, "billie eilish" as artist union
+  select "birds of a feather" , "billie eilish"           union
+  select "360"                , "charli xcx"              union
+  select "pasilyo"            , "sunkissed lola"          union
+  select "cinderella"         , "remi wolf"               union
+  select "good luck babe!"    , "chappell roan"           union
+  select "meow"               , "anamanaguchi";
+
+select track from spotify where artist = “billie eilish”;
+
+select track from spotify where track < artist;

assets/slides/21.sql

@@ -0,0 +1,25 @@
+
+-- Parents
+create table parents as
+  select "a" as parent, "b" as child union
+  select "a"          , "c"          union
+  select "d"          , "h"          union
+  select "f"          , "a"          union
+  select "f"          , "d"          union
+  select "f"          , "g"          union
+  select "e"          , "f";
+
+
+-- Spotify
+create table spotify as
+  select "wildflower" as track, "billie eilish" as artist union
+  select "birds of a feather" , "billie eilish"           union
+  select "360"                , "charli xcx"              union
+  select "pasilyo"            , "sunkissed lola"          union
+  select "cinderella"         , "remi wolf"               union
+  select "good luck babe!"    , "chappell roan"           union
+  select "meow"               , "anamanaguchi";
+
+select track from spotify where artist = “billie eilish”;
+
+select track from spotify where track < artist;

assets/slides/22.sql

@@ -0,0 +1,147 @@
+------------------------
+-- Music with friends --
+------------------------
+
+CREATE TABLE shm_tracks AS
+SELECT "360" AS track, "charli" AS artist UNION
+SELECT "cinderella"  , "remi"             UNION
+SELECT "wildflower"  , "billie";
+
+CREATE TABLE anya_tracks AS
+SELECT "apple" AS track, "charli" AS artist UNION
+SELECT "taste"         , "sabrina"          UNION
+SELECT "wildflower"    , "billie";
+
+-- songs in common
+SELECT 
+shm_tracks.track AS s_track, 
+shm_tracks.artist AS s_artist, 
+anya_tracks.track AS a_track, 
+anya_tracks.artist AS a_artist
+FROM shm_tracks, anya_tracks 
+WHERE s_track = a_track;
+
+-- artists or songs in common
+SELECT
+shm_tracks.artist AS s_artist,
+shm_tracks.track AS s_track,
+anya_tracks.track AS a_track,
+anya_tracks.artist AS a_artist
+FROM shm_tracks, anya_tracks
+WHERE s_track = a_track OR s_artist = a_artist
+;
+
+
+
+-- song pairs
+SELECT a.track AS track1, b.track AS track2, a.artist AS artist 
+FROM shm_tracks AS a, shm_tracks AS b 
+WHERE a.artist=b.artist AND a.track < b.track;
+-- OR:
+SELECT a.track AS track1, b.track AS track2, a.artist AS artist 
+FROM shm_tracks AS a, shm_tracks AS b 
+WHERE a.artist=b.artist AND a.track != b.track 
+GROUP BY a.artist;
+
+
+----------
+-- Dogs --
+----------
+
+-- Parents
+CREATE TABLE parents AS
+  SELECT "ace" AS parent, "bella" AS child UNION
+  SELECT "ace"          , "charlie"         UNION
+  SELECT "daisy"        , "hank"         UNION
+  SELECT "ellie"        , "finn"         UNION
+  SELECT "finn"         , "ace"          UNION
+  SELECT "finn"         , "daisy"          UNION
+  SELECT "finn"         , "ginger";
+
+-- Fur
+CREATE TABLE dogs AS
+  SELECT "ace" AS name, "long" AS fur UNION
+  SELECT "bella"      , "short"       UNION
+  SELECT "charlie"    , "long"        UNION
+  SELECT "daisy"      , "long"        UNION
+  SELECT "ellie"      , "short"       UNION
+  SELECT "finn"       , "curly"       UNION
+  SELECT "ginger"     , "short"       UNION
+  SELECT "hank"       , "curly";
+
+
+
+-- Parents of curly dogs
+SELECT parent FROM parents, dogs WHERE child = name AND fur = "curly";
+
+-- Siblings
+SELECT a.child AS first, b.child AS second
+  FROM parents AS a, parents AS b
+  WHERE a.parent = b.parent AND a.child < b.child;
+
+-- Grandparents
+CREATE TABLE grandparents AS
+  SELECT a.parent AS grandog, b.child AS granpup
+    FROM parents AS a, parents AS b
+    WHERE b.parent = a.child;
+
+-- Grandogs with the same fur AS their granpups
+SELECT grandog, granpup, c.fur FROM grandparents, dogs AS c, dogs AS d
+  WHERE grandog = c.name AND
+        granpup = d.name AND
+        c.fur = d.fur;
+
+-- Dog triples
+SELECT a.name, b.name, c.name FROM dogs AS a, dogs AS b, dogs AS c
+  WHERE a.name > b.name AND b.name > c.name AND a.fur = b.fur AND b.fur = c.fur;
+
+------------
+-- Cities --
+------------
+
+CREATE TABLE cities AS
+  SELECT 38 AS latitude, 122 AS longitude, "Berkeley" AS name UNION
+  SELECT 42,              71,              "Cambridge"        UNION
+  SELECT 45,              93,              "Minneapolis"      UNION
+  SELECT 33,             117,              "San Diego"        UNION
+  SELECT 26,              80,              "Miami"            UNION
+  SELECT 90,               0,              "North Pole";
+
+CREATE TABLE cold AS
+  SELECT name FROM cities WHERE latitude > 43 UNION
+  SELECT "Chicago";
+
+SELECT name, "is cold!" FROM cold;
+
+CREATE TABLE distances AS
+  SELECT a.name AS first, b.name AS second,
+         60*(a.latitude-b.latitude) AS distance
+         FROM cities AS a, cities AS b
+         WHERE a.name != b.name
+         ORDER BY a.longitude;
+
+SELECT second FROM distances WHERE first="Minneapolis" ORDER BY -distance;
+
+---------------
+-- Sentences --
+---------------
+
+CREATE TABLE nouns AS
+  SELECT "the dog" AS phrase UNION
+  SELECT "the cat"           UNION
+  SELECT "the bird";
+
+SELECT subject.phrase || " chased " || object.phrase
+       FROM nouns AS subject, nouns AS object
+       WHERE subject.phrase != object.phrase;
+
+CREATE TABLE ands AS
+  SELECT phrase FROM nouns UNION
+  SELECT first.phrase || " AND " || second.phrase
+         FROM nouns AS first, nouns AS second
+         WHERE first.phrase != second.phrase;
+
+SELECT subject.phrase || " chased " || object.phrase
+       FROM ands AS subject, ands AS object
+       WHERE subject.phrase != object.phrase;
+

index.html

@@ -1538,6 +1538,7 @@ <h2 class="frontpage-header">Calendar</h2>
 
 <ul class="list-inline">
   <li><a href="https://www.youtube.com/watch?v=uQcTiRihNHc&list=PL6BsET-8jgYUYE7waSWnQpeIZwM7naLWk&ab_channel=JohnDeNero" class="label label-outline" target="_blank">Videos</a></li>
+<li><a href="/fa24/assets/slides/22-Tables_1pp.pdf" class="label label-outline">Slides (1pp)</a></li>
 </ul>
 </td>
 <td>
@@ -1785,7 +1786,7 @@ <h3><a href="/articles/about">Policies</a></h3>
 
  });
 
- let build_time = new Date(1000 * 1732145625.438673);
+ let build_time = new Date(1000 * 1732147060.953269);
  </script>
  <script>
   $('.alwaystoggle').css('display', 'inline-block');

lecture/lec22/index.html

@@ -154,6 +154,8 @@ <h2 id="prerecorded"><a href="#playlist">Lecture Playlist</a></h2>
 
           <a href="https://www.youtube.com/watch?v=uQcTiRihNHc&list=PL6BsET-8jgYUYE7waSWnQpeIZwM7naLWk&ab_channel=JohnDeNero" class="label label-outline" target="_blank">Videos</a>
 
+          <a href="/assets/slides/22-Tables_1pp.pdf" class="label label-outline" target="_blank">Slides (1pp)</a>
+
           <a href="/assets/slides/22.py" class="label label-outline" target="_blank">22.py</a>
 
     </ul>