daviddoji-cs50/problems/2024/sql/cyberchase@20260413T132847.606975445Z

1.sql

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+-- write a SQL query to list the titles of all episodes in Cyberchase’s original season, Season 1.
+SELECT "title" FROM "episodes" WHERE "season" = 1;

10.sql

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+-- write a SQL query to list the ids, titles, and production codes of all episodes. Order the results by production code, from earliest to latest.
+SELECT "id", "title", "production_code" FROM "episodes" ORDER BY "production_code" ASC;

11.sql

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+-- list the titles of episodes from season 5, in reverse alphabetical order.
+SELECT "title" FROM "episodes" WHERE "season" = 5 ORDER BY "title" DESC;

12.sql

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+-- count the number of unique episode titles.
+SELECT COUNT(DISTINCT "title") FROM "episodes";

13.sql

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+-- write a SQL query to explore a question of your choice. This query should:
+-- Involve at least one condition, using WHERE with AND or OR
+SELECT "title" FROM "episodes" WHERE "season" = 1 AND "topic" LIKE "%and%"

2.sql

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+-- list the season number of, and title of, the first episode of every season.
+SELECT "season", "title" FROM "episodes" WHERE "episode_in_season" = 1;

3.sql

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+-- find the production code for the episode “Hackerized!”.
+SELECT "production_code" FROM "episodes" WHERE "title" = "Hackerized!";

4.sql

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+-- write a query to find the titles of episodes that do not yet have a listed topic.
+SELECT "title" FROM "episodes" WHERE "topic" IS NULL;

5.sql

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+-- find the title of the holiday episode that aired on December 31st, 2004.
+SELECT "title" FROM "episodes" WHERE "air_date" = "2004-12-31";

6.sql

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+-- list the titles of episodes from season 6 (2008) that were released early, in 2007.
+SELECT "title" FROM "episodes" WHERE "season" = 6 AND "air_date" LIKE "2007%";

7.sql

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+-- write a SQL query to list the titles and topics of all episodes teaching fractions.
+SELECT "title", "topic" FROM "episodes" WHERE "topic" LIKE "%Fractions%";

8.sql

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+-- write a query that counts the number of episodes released in the last 6 years, from 2018 to 2023, inclusive.
+-- You might find it helpful to know you can use BETWEEN with dates, such as BETWEEN '2000-01-01' AND '2000-12-31'.
+SELECT COUNT("title") FROM "episodes" WHERE "air_date" BETWEEN "2018-01-01" AND "2023-12-31";

9.sql

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+-- write a query that counts the number of episodes released in Cyberchase’s first 6 years, from 2002 to 2007, inclusive.
+SELECT COUNT("title") FROM "episodes" WHERE "air_date" BETWEEN "2002-01-01" AND "2007-12-31";